[meteorite-list] Four "new" terrestrial Craters under new study

[Charles O';Dale]

On an astronomy list I belong to, new studies of four different terrestrial 
craters are being discussed, FYI:
 
Kercher Lake, Saskatchewan:
 
http://astronomy.activeboard.com/forum.spark?aBID=58381&p=3&topicID=7625323

http://travelingluck.com/North%20America/Canada/Saskatchewan/_5991213_Kercher%20Lake.html#local_map

 
 
Bloody Creek, Nova Scotia:
 
http://www.acadiau.ca/~ispooner/pdfs_of_papers/Bloody%20Creek%20Crater.pdf
 
http://www.annapolisdigby.com/index.php?option=com_content&view=article&id=482:bridgetown-crater-could-draw-geo-tourists&catid=1:latest-news&Itemid=50

 
 
New York’s Finger Lakes Region
 
http://blogs.agu.org/meetings/2010/12/21/new-york-state%E2%80%99s-hidden-secret-a-subterranean-impact-crater/

 
 Howel Creek Structure, British Columbia:
 
http://bcpg.geoscienceworld.org/cgi/content/abstract/25/4/868
 
From the Howel Creek paper:

Though the concept is still in its infancy, I believe that the HCS is the 
footprint of a complex marine impact crater that was originally on the order of 
10 km in diameter. Dating of the impact is still uncertain though it appears to 
be of Cretaceous age. This age assumes that the impact occurred after the 
intrusion of the 97 Mya Howell Creek syenites (I believe that the unusual 
exposure of the complex was due largely to excavation and sliding initiated by 
this event) but preceded deposition of the 90 Mya Cardium sands...
 
 
If anyone has further information on any of these structures, please let me 
know.
 
Chuck
http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles
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Re: [meteorite-list] Other hobbies?

[Charles O';Dale]

http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles

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[meteorite-list] The Murchison Meteorite - was Cyanobacteria in meteorites?

[Charles O';Dale]

More fuel for the fire:

 
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/1998023_1998372757.pdf 

Chuck

> Date: Sat, 21 Aug 2010 16:31:46 -0700 (PDT)
> From: Charles O'Dale 
> Subject: [meteorite-list] The Orgueil Meteorite - was Cyanobacteria in
>     meteorites?
> To: meteorite-list@meteoritecentral.com
> Message-ID: <509316.50397...@web88007.mail.re2.yahoo.com>
> Content-Type: text/plain; charset=us-ascii
> 
> Explains the Orgueil Meteorite "organic" content.
> 
> http://www.museumofhoaxes.com/orgueil.html
> 
> Still looking for "evidence" for - Cyanobacterial filaments in the Murchison -
> 
> Chuck


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[meteorite-list] The Orgueil Meteorite - was Cyanobacteria in meteorites?

[Charles O';Dale]

Explains the Orgueil Meteorite "organic" content.

http://www.museumofhoaxes.com/orgueil.html

Still looking for "evidence" for - Cyanobacterial filaments in the Murchison -

Chuck

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[meteorite-list] Fw: Cyanobacteria in meteorites?

[Charles O';Dale]

Apparently this is a hoax, sorry about that guys !!  : (

Chuck
http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles



- Forwarded Message 
> From: Charles O'Dale 
> To: meteorite-list@meteoritecentral.com
> Sent: Fri, August 20, 2010 8:35:04 AM
> Subject: Cyanobacteria in meteorites?
> 
> http://www.panspermia.org/hoover4.htm
> 

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[meteorite-list] Cyanobacteria in meteorites?

[Charles O';Dale]

http://www.panspermia.org/hoover4.htm

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[meteorite-list] Impact Cratering and the Solar System Cataclysm

[Charles O';Dale]

Impact Cratering and the Solar System Cataclysm
Robert G. Strom

http://www.ustream.tv/recorded/6542749

Well worth an hour of your time.

Chuck O;Dale
http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles

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Re: [meteorite-list] Meteorite-list Digest, Vol 80, Issue 30

[Charles O';Dale]

Interesting, while you are exploring the structure, if you find a shatter cone 
you will confirm an impact. 

But, by the looks of it, its probably volcanic.

Chuck
http://ottawa-rasc.ca/wiki/index.php?title=Oldale-Articles-Introduction#Shatter_Cones

Date: Wed, 14 Apr 2010 19:49:10 -0400 (EDT)
From: countde...@earthlink.net" 
Subject  [meteorite-list] Impact Crater - Nevada?

Gentlemen and Ladies of the 
> List,

Especially those of you interested in, or experienced in impact 
> craters. I came across this feature yesterday while planning a field trip to 
> a 
> nearby area. I have been on the ground in this location several times, but 
> wasn't aware of it's circular and elevated confirmation until looking on 
> Google.

  37?55'19.81"N  115? 
> 9'30.56"W

Comments?

Count Deiro
IMCA 
> 3536

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[meteorite-list] Dating Meteorites

[Charles O';Dale]

http://www.youtube.com/user/cdk007

Chuck O'Dale
http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles

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[meteorite-list] Upheaval Dome

[Charles O';Dale]

All:

I just updated my web-site to include my report on explorations of the Upheaval 
Dome in Utah.

http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles-UpheavalDome 

FYI
Chuck

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[meteorite-list] Reevaluating the age of the Solar System

[Charles O';Dale]

YouTube at the end of the e-mail (a must)
 
Reevaluating the age of the Solar System Gregory A. BrenneckaSchool of Earth 
and Space Exploration, Arizona State University
Lead-lead (Pb-Pb) dating is among the most widely used radiometric dating 
techniques to determine the age of really old things, such as the age of the 
Earth or the Solar System. However, recent advances in instrumentation now 
allow scientists to make more precise measurements that promise to 
revolu­tionize the way the ages of some samples are calculated with this 
technique. 
Radiometric dating can be used to determine the age of a wide range of natural 
and human-made materials. The comparison between the observed abundance of a 
naturally occurring radioactive isotope, such as uranium (U), and its decay 
products can be used to determine the age of a material, using known decay 
rates. The Pb-Pb dating technique has been used for decades under the 
assumption that the ratio of the 238U and 235U isotopes, both of which decay to 
different isotopes of Pb, is constant 
 in meteoritic material. Any deviation from this assumed value causes 
miscal­culation in the determined Pb-Pb age of a sample, meaning that the age 
of the Solar System could be miscalculated by as much as several million years. 
Although this is a small fraction of the ~4.57 billion year age of the Solar 
Sys­tem, it is significant since some of the most important events that shaped 
the Solar System occurred within the first ~10 million years of its formation. 
in the Solar System. This assumed value is built into the Pb-Pb age equation. 
 
According to research published online in the Dec. 31 issue of Science Express 
and in the Jan. 22 issue of Science magazine by Greg Brennecka, a graduate 
student in SESE, the 238U/235U ratio can no longer be considered a constant in 
meteoritic material. Any deviation from this assumed value causes 
miscal­culation in the determined Pb-Pb age of a sample, meaning that the age 
of the Solar System could be miscalculated by as much as several million years. 
Although this is a small fraction of the ~4.57 billion year age of the Solar 
Sys­tem, it is significant since some of the most important events that shaped 
the Solar System occurred within the first ~10 million years of its formation.
Brennecka and colleagues measured the 238U/235U ratio in the earliest solids in 
the Solar System, calcium-aluminum-rich inclu­sions (CAIs). CAIs were the first 
solids to condense from the cooling protoplanetary disk during the birth of the 
Solar System. The absolute ages of the CAIs, determined through Pb-Pb dating, 
are generally considered to date the origin of the Solar System. The 
high-precision data they obtained from CAIs of the Allende meteor­ite showed 
that the 238U/235U ratio is not the same in all CAIs. 
Brennecka began to think about the idea that the U isotope ratio might not be 
constant in meteoritic material after learning about work done by Professor 
Stefan Weyer of the Goethe University of Frankfurt during a sabbatical visit to 
ASU the previous year. Weyer’s work revealed measurable differences in 
238U/235U in different environments on Earth.. 
At this time, Brennecka was taking a class on meteorites and the origin of the 
Solar System from Meenakshi Wadhwa, a professor in SESE and director of the ASU 
Center for Meteorite Studies. For a class assignment, Brennecka developed a 
research proposal centered on the implications of variable U isotopes in early 
Solar System materials. Anbar and Wadhwa encouraged him to take the proposal 
from the classroom to the laboratory. 
Brennecka worked with Anbar and Wadhwa to refine the proce­dures at ASU to be 
able to measure 238U/235U in the extremely small CAIs. Eleven of the thirteen 
CAIs were from the ASU Center for Meteorite Studies collection; the other two 
were from the Senckenberg Museum collection in Frankfurt. The project was 
supported by NASA, including the NASA Origins of Solar Systems Program, and the 
NASA Astrobiology Institute (NAI). ASU is home to one of 14 research teams from 
across the country that com­prise the NAI which explores the origin, evolution, 
distribution, and future of life on Earth and in the universe. 
The U isotope ratios in all but two CAIs differed significantly from the 
standard “assumed” value. One of the possible mechanisms that could have 
produced these U isotope variations in meteorites is the decay of extant 247Cm 
to 235U. 247Cm is created during only certain types of supernovae and has a 
very short half-life (15.6 million years) compared to the age of the Solar 
System, so all of the 247Cm that was present originally has since completely 
decayed away. Brennecka and colleagues performed additional tests to determine 
if this was the cause of the U isotope variation. 
If a correlation existed between the 238U/235U values and the original Cm/U in 
the CAIs, it would provide evidence that 247Cm was the reason for the 238U/235U 
variati

[meteorite-list] Crater discovered off the Azores?

[Charles O';Dale]

http://news.bbc.co.uk/2/hi/science/nature/8400264.stm

Chuck
http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles
'Fried Egg' may be impact crater  
By Jonathan Amos 
Science correspondent, BBC News, San Francisco  
'Fried Egg' may be impact crater  
By Jonathan Amos 
Science correspondent, BBC News, San Francisco  
'Fried Egg' may be impact crater 
Portuguese scientists have found a depression on the Atlantic Ocean floor they 
think may be an impact crater. 
The roughly circular, 6km-wide hollow has a broad central dome and has been 
dubbed the "Fried Egg" because of its distinctive shape. 
It was detected to the south of the Azores Islands during a survey to map the 
continental shelf. 
If the Fried Egg was made by a space impactor, the collision probably took 
place within the past 17 million years. 


This is the likely maximum age of the basaltic sea-floor rock which harbours 
the feature. 
"To be sure, we need to take samples and make a profile of the sediment layers 
to determine if there really is a central uplift from an impact," explained Dr 
Frederico Dias from EMEPC (Task Group for the Extension of the Portuguese 
Continental Shelf). 
"We need also to see all the signatures that are consistent with a high 
velocity impact, like glasses from melting and, of course, debris; and what are 
called shatter cones (shocked rocks)," he told BBC News. 
Central peaks
Dr Dias described the putative impact feature here at the American Geophysical 
Union's (AGU) Fall Meeting, the world's largest annual gathering of Earth 
scientists. 
The Fried Egg was first identified in data gathered by a 2008 multibeam 
echosounder hydrographic survey. A further cruise from September to November 
this year confirmed its presence. 
It lies under 2km of water about 150km from the Azores archipelago. 
The depressed ring sits roughly 110m below the surrounding ocean bottom, with 
the circular dome-shaped central uplift 3km in diameter and with a base-to-top 
height of some 300m. 
Central peaks are often associated with meteorite impacts and form when the 
compressed crater floor rebounds. A peak is not definitive proof of an impact, 
however. 
A volcanic origin for the Fried Egg seems unlikely because the Portuguese team 
has not been able to find any lava flows within the structure or on its 
surroundings. 
Second crater
Interestingly, there is another - but much smaller - feature just 3-4km to the 
west of the egg. 
"It's just by the side. If the Fried Egg is a crater, this could be a crater 
also," speculated Dr Dias. 
Dr Dias and colleagues are examining gravity and magnetic data gathered during 
September's cruise. A third expedition to the area early next year will use a 
remotely operated vehicle (ROV) to try to retrieve samples from the ocean floor 
for analysis. 
The Portuguese team detailed the currently available Fried Egg data on a poster 
at the AGU meeting. Other researchers who came to view the information were 
split on the impact theory, Dr Dias said. 
"Even if it's not an impact crater it's still a very interesting feature," he 
told the BBC. 
The EMEPC is working under the United Nations Convention on the Law of the Sea 
to establish the true extent of Portuguese territorial waters. 
jonathan.amos-inter...@bbc.co.uk

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[meteorite-list] St. Martin Impact Structure

[Charles O';Dale]

FYI, data on the St. Martin Impact Structure ...

http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles-StMartin

 is added to my crater documentation:

http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles

Also, various other articles have been updated.

Chuck O'Dale (AKA crater chaser)
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[meteorite-list] Indochina Tektites

[Charles O';Dale]

RE: The ongoing mystery of where is the source of the Indochina and Australia 
tektites;

An interesting "feature" is revealed in the new Google Ocean. To me it seems 
that there is a central peaked crater 1317 metres deep at:

N 13* 46.29"  E 111* 20.05"

Could this be the "missing crater" that is the source of the Asian tektites? 
Cool EH?

Chuck O'Dale
http://ottawa-rasc.ca/wiki/index.php?title=Odale-Articles
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[meteorite-list] National Geographic article URL

[Charles O';Dale]

A request:

A little while ago someone published a URL of the National Geographic article 
on impacts?, and will my trip confusion, I lost it.

If someone could forward me the URL, I would sincerely appreciate it.

Thanks in advance
Chuck

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[meteorite-list] Distorting the Science of Meteorites

[Charles O';Dale]

http://www.icr.org/article/4093/

Chuck
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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[meteorite-list] Pingualuit

[Charles O';Dale]

http://www.flickr.com/photos/chuckexpeditions/2813874599/

I just returned from northern Quebec where I was exploring the Pingualuit 
impact structure. This image gives you an appreciation for the size of the 
crater!

Chuck

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[meteorite-list] impact craters of N.A.,

[Charles O';Dale]

Dirk:

Don't forget Pingualuit, 

N 61° 17' W 73° 40'

If all goes well, I should be walking around that crater rim next week. I'll 
send you a couple of images.

Chuck
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html

> Message: 2
> Date: Sun, 17 Aug 2008 10:20:20 -0700 (PDT)
> From: drtanuki <[EMAIL PROTECTED]>
> Subject: [meteorite-list] impact craters of N.A., S.A.,
> Africa,
>   Europe, Australia and Asia completed
> To: meteorite-list@meteoritecentral.com
> Message-ID:
> <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=us-ascii
> 
> Dear List,
>   I hve completed what pages and entries for impact craters
> that I can for the the above areas.  Please have a look. 
> The pages will be updated as time permits with corrections
> and more additions.
> 
>  If you have a confirmed crater that you would like added
> please ask.  If you notice any corrections needed, please
> let me know off-list.
> 
>   Thank you.  In the short future I will add a page on how
> to use Google Earth as a search tool for impact crater
> hunting.
> 
> BEST ALWAYS, DIRK ROSS...TOKYO
> 
> http://meteoritesjapan.com/africacraters.aspx
> 
> http://meteoritesjapan.com/asiacraters.aspx
> 
> http://meteoritesjapan.com/aussicraters.aspx
> 
> 
> http://meteoritesjapan.com/eurocraters.aspx
> 
> http://meteoritesjapan.com/SAcraters.aspx
> 
> 
> http://meteoritesjapan.com/nortecraters.aspx
> 
> 
>   THESE FIVE PAGES REPRESENT OVER ONE WEEK`S WORK, PLEASE
> ENJOY!
> 
> http://meteoritesjapan.com/default.aspx
> 
> 
> 
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Re: [meteorite-list] Santa Fe, NM Impact Crater Latitude and Longitude

[Charles O';Dale]

Thank you everyone for responding to my question regarding the newly discovered
Santa Fe impact structure.

If I ever fly over the area, I will post my pictures of the "crater".

Thanks again
Chuck
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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Re: [meteorite-list] Santa Fe, NM Impact Crater article

[Charles O';Dale]

Dirk:

Any idea on the exact position of this structure (Lat/Long)?

Chuck
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html

> Date: Tue, 24 Jun 2008 16:35:39 -0700 (PDT)
> From: drtanuki <[EMAIL PROTECTED]>
> Subject: [meteorite-list] Santa Fe, NM Impact Crater article
> 
> Dear List,
>   A recent article about the newly discovered Santa Fe impact crater:
> 
>
http://space.newscientist.com/article/mg19826604.800-roadside-crater-should-have-made-more-of-an-impact.html?feedId=space_rss20
> 
> Best, Dirk Ross...Tokyo
> 

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[meteorite-list] How to become rich - FAST!!

[Charles O';Dale]

http://www.dailymail.co.uk/pages/live/articles/news/worldnews.html?in_article_id=558478&in_page_id=1811
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Re: [meteorite-list] Crater Identification

[Charles O';Dale]

RE: confirming an impact structure, I've compiled some information on the 
subject
at:

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/intro.html

If I have missed anything, please let me know.

Chuck O'Dale
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html




> Date: Wed, 19 Mar 2008 15:13:26 -0400 (EDT)
> From: Greg Redfern <[EMAIL PROTECTED]>
> Subject: Re: [meteorite-list] New Crater Found?

> All,
> 
> Does anyone know what field work and follow on scientific analysis was done to
> confirm the crater as being an impact crater? Without collection of geological
> data and samples from the alleged impact site followed by scientific analysis 
> of
> same, it CANNOT be confirmed as an impact crater. This is analogous as to the
> scientific classification process that alleged meteorites must undergo in 
> order to
> CONFRIM their origin.
> 
> All the best.
> 
> Greg Redfern 
> 
>
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[meteorite-list] Impact Structure Article Updates

[Charles O';Dale]

FYI, I have updated my articles on the Isle Rouleau and Presqu'ile impact 
structures
to include our ground explorations from this summer:

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/Ile_Rouleau/index.html

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/presqu_ile/index.html



Charles O'Dale
President
RASC - Ottawa Centre
http://www.ottawa.rasc.ca/index.php
http://www.ottawa.rasc.ca/science/index.html
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Re: [meteorite-list] Peru Again!! Ubinas, Peru volcanic bomb

[Charles O';Dale]

Just to add some more mystery to the latest crater/pit in Peru issue - there is 
a
crater in northern Quebec that is very similar in size and shape whose origin is
still an issue - Merewether.

http://epod.usra.edu/archive/epodviewer.php3?oid=315776

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/merewether/index.html

Chuck
Ottawa, Canada


> Date: Tue, 16 Oct 2007 20:12:18 -0700 (PDT)
> From: drtanuki <[EMAIL PROTECTED]>
> Subject: Re: [meteorite-list] Peru Again!! Ubinas,Peru volcanic bomb
>   block crater- Smithsonian   Institution-INGEMMETstudy
> To: "Sterling K. Webb" <[EMAIL PROTECTED]>,
>   meteorite-list@meteoritecentral.com
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=iso-8859-1
> 
> Hi Sterling and List,
>   Sterling has hit the nail exactly on the head! No or
> little impactor was left in the crater. They will
> still finishing messing up the Carancas impact crater
> anyway or the rain will finish it off, either way it
> is likely gone
>   Happy always to read your posts.  I was lucky to
> just find these photos tonight while searching for HE
> bomb craters in Osaka.
>   No satellite imagery data has been located of the
> Carancas impact crater following the event, too bad.
>   Best Regards, Dirk Ross...Tokyo
> 
> --- "Sterling K. Webb" <[EMAIL PROTECTED]>
> wrote:
> 
> > Hi, Dirk, List,
> > 
> > The picture of the 2-meter "bomb" shows there
> > no distinction between an impact pit (which is what
> > this is) and a true crater, formed by an explosion.
> > The shape (but not the size) is the same for both.
> > The object's mass is up to 10 tons, but the velocity
> > was low, probably no more than 100 m/sec (depends
> > on how high it was tossed out of the volacano). A
> > "pit" is a low-energy event; a crater is not, but
> > the
> > shape's the same.
> > 
> > The geometry of the pit or crater is very close
> > to that perfect conical shape of the mathematical
> > crater models with their 3:1 width-to-depth. But
> > since
> > it's the energy that determines the crater, you
> > could
> > have gotten the same crater that was produced by
> > ten tons at 100 m/sec with 100 kilos at 1000 m/sec,
> > or 1 kilo at 10,000 m/sec.
> > 
> > It's a picture like this that demonstrates the
> > true
> > silliness of the idea that a "ten-ton monster" is
> > hiding
> > in the Carancas crater. The URL's a picture of a
> > ten-meter crater (OK, pit) with a ten ton impactor
> > sitting in it. Does it look to you like it's hiding?
> > I think
> > we'd have noticed a ten-monster in Carancas... if it
> > was intact!
> > 
> > 
> > Sterling K. Webb
> >
> -
> > - Original Message - 
> > From: "drtanuki" <[EMAIL PROTECTED]>
> > To: 
> > Sent: Tuesday, October 16, 2007 8:01 PM
> > Subject: [meteorite-list] Peru Again!! Ubinas,Peru
> > volcanic bomb block 
> > crater- Smithsonian Institution-INGEMMETstudy
> > 
> > 
> > Hi List,
> >   Thought some of you might be interested in seeing
> > another crater in Peru.  Take a look at the photo
> > page
> > at least!  Best Regards, Dirk Ross...Tokyo
> > 
> > 
> > Main Page:
> >
>
http://www.volcano.si.edu/reports/bulletin/contents.cfm?issue=3110&display=complete
> > 
> > 
> > Photo:
> > 
> >
> http://www.volcano.si.edu/volcanoes/region15/peru/ubinas/3110ubi7.jpg
> > 
> > Figure 14. Ubinas eruptions in May 2006 ejected
> > volcanic bombs, seen here in their impact craters. A
> > 2-m-diameter bomb (top), struck ~ 200 m from the
> > crater. A crater containing a large, partly buried,
> > smooth-faced bomb is seen in the bottom photo.
> > Numerous bucket-sized angular blocks appear on the
> > far
> > side of the impact crater. Two geologists stand
> > adjacent a ~ 2-m-long block that ended up on the
> > impact crater's rim. The bomb fragments were of
> > andesitic composition. Top photo from Salazar and
> > others (2006); bottom photo from INGEMMET website.
> > __

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Re: [meteorite-list] Experts Now Say a Rare Meteorte Likely Caused Peru Crater

[Charles O';Dale]

It would be interesting to find out if the bolide impacted with "terminal" or
"cosmic" velocity.

Chuck O'Dale
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
 
> http://www.signonsandiego.com/news/world/20070920-1507-peru-meteorite.html
> 
> Experts now say a rare meteorite likely caused Peru crater
> By Edison Lopez
> ASSOCIATED PRESS
> September 20, 2007
> 

> More details emerged when astrophysicist Jose Ishitsuka of Peru's
> Geophysics Institute reached the site about 6 miles from Lake Titicaca.
> He confirmed that a meteorite caused a crater 42 feet wide and 15 feet
> deep, the institute's president, Ronald Woodman, told The Associated
> Press on Thursday.
> 

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[meteorite-list] New KT asteroid injection theory PART ONE

[Charles O';Dale]

Further to the hypothesis that the impact rates in the solar system may be a
function of the solar system's position in the galaxy, Shoemaker referred to 
this in
one of his last presentations (page 297):

http://www.rasc.ca/journal/pdfs/1998-12.pdf

His hypothesis is that "The study of the impact history of earth is in reality 
a way
to study the history of the motion of the Earth in the Galaxy."

Chuck O'Dale
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html


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[meteorite-list] Meteorite Questions (square craters)

[Charles O';Dale]

It is a "jointed crater", determined by the geology of the area of impact.

http://science.nasa.gov/headlines/y2000/ast26sep_1.htm

Chuck

> Date: Thu, 30 Aug 2007 01:14:27 -0700
> From: "Jason Utas" <[EMAIL PROTECTED]>
> Subject: Re: [meteorite-list] Meteorite Questions
> To: Meteorite-list 


> 
> > For example, why does the rim of meteor crater appear "squared" in some
> > photos, while in others it appears very round?  Perspective?  Lighting?
> > Extremely highly localized tectonic shifting (back and forth)?
> 
> It has eroded into a somewhat rectangular shape over the 50,000 years
> that it's spent sitting there in the desert...it's current shape is
> probably due somewhat to stress fractures that exist either because
> they were created in the underlying rock by tectonic movement or
> possibly from the impact itself, so the angle of impact might have
> something to do with the orientation of the 'sides,' but you're
> dealing with advanced geology and physics there, in both of which I'm
> something of a dilettante.
> 


Charles O'Dale
President
RASC - Ottawa Centre
http://www.ottawa.rasc.ca/index.php
http://www.ottawa.rasc.ca/science/index.html
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Re: [meteorite-list] FOLLOWUP TO Smallest Possible Earth Impact Crater?

[Charles O';Dale]

Sterling, thanks as always.

I guess what has to be determined here is whether Merewether is a "cosmic 
velocity bolide crater", a "terminal velocity bolide pit" or a naturally formed 
structure whose formation method is unknown. No meteorite material or impact 
rock types have been found at the site.

An interesting thing about the whole structure is that it "may" be a crater 
string since there seem to be three impact structures lined up at the site.

Chuck
  - Original Message - 
  From: Sterling K. Webb 
  To: Charles O'Dale ; meteorite-list@meteoritecentral.com 
  Sent: Thursday, July 19, 2007 4:21 PM
  Subject: Re: [meteorite-list] FOLLOWUP TO Smallest Possible Earth Impact 
Crater?


  Hi, Charles, List,

  I just went and read your excellent article on Merewether:
  http://ottawa.rasc.ca/articles/odale_chuck/earth_craters/merewether/index.html
  so now I know Merewether is 200 meters across. However,
  the key data is that the crater is NOT in a rock surface, but
  a glacial morraine of boulders gobbed up with sand and clay.

  That fact alone would explain the absence of a rim upturn.
  Rims are formed by the explosion "pushing" upward against
  horizontal strata that are significantly rigid and "resist" being
  pushed with a strength beyond the mere weight of the material.
  A conglomerate of boulders and mud is not rigid, hence no
  tilted rim is produced.


  Sterling K. Webb
  --
  - Original Message - 
  From: "Sterling K. Webb" <[EMAIL PROTECTED]>
  To: "Charles O'Dale" <[EMAIL PROTECTED]>; 
  
  Sent: Thursday, July 19, 2007 2:30 PM
  Subject: Re: [meteorite-list] Smallest Possible Earth Impact Crater?


  Hi, Charles, List

  The three most important characteristics an incoming
  body needs if it wants to get to the surface in one piece
  are a) slow entry speed, b) a shallow entry angle, and c)
  an aerodynamic (flattened) shape. Calculations performed
  by John S. Lewis suggest that, with a shallow entry just
  above escape velocity, an an iron of 30 to 100 tons can
  "land" without making a crater.

  HOBA is a perfect example at 60 tons. It sits on a flat
  surface surrounded by red rusty soil that may contain 25
  or more tons of degraded iron shale residue.

  The same calculations for a stone meteorite give an
  upper weigh limit of around 40 tons, however there are no
  stones known that come anywhere near this mass. Stones
  are too fragile; they fragment too easily. (JILIN has the
  record at 1.77 ton.) However, if anyone finds a ten-foot
  diameter stone meteorite, it's fine with me.

  Of course, with a higher incoming speed and a more
  usual angle, that 100 ton iron would make a lovely crater.
  Using the excellently handy LPL Impact Calculator:
  http://www.lpl.arizona.edu/impacteffects/
  we see that (theoretically at least) a 10 cm (4 inch) iron
  ball entering the atmosphere at 15,000 m/sec at a 45 degree
  angle reaches the surface at about 800 mph with a force
  of about 200 pounds of TNT and would make a four-foot
  crater in sedimentary rock; the crater would be about 15
  inches deep with five inches of broken rock in the bottom.
  Oh, and the iron ball would survive intact!

  That is what a good computer model says. Whether this
  actually happens in real life is another matter. The computer
  model only calculates target surfaces of water or sedimentary
  or crystaline rock. Small craters in which the impactor survives
  are technically not impact craters -- they are impact pits. An
  impact pit has the rock or dirt removed by mechanical force,
  not by an explosive event. It takes an explosive event to make
  a technically "true" crater. There are a small number of
  examples of meteorites recovered from impact pits in dirt,
  though.

  What is the size of Merewether? From the look of the picture
  it must 100's of feet across. I took my previous example from
  the impact calculator and re-ran it with larger and larger iron
  balls and got bigger and bigger craters, over 300 feet in diameter,
  until I reached the size where the impactor fragments, after which
  I get crater fields from the fragments. Of course, that's with one
  limited set of parameters; other parameter, other results. The small
  "craters" (less than 20-30 feet) were all shallow impact pits with
  a surviving object. Above a certain size, they were all explosive
  craters, with that characteristically deeper profile.

  Merewether is certainly more than big enough to be an explosive
  crater. This does not say that it is, but if there's an objection that it is
  "too small" to be an explosive crater, that's a mistake.


  Sterling K. Webb
  
--

[meteorite-list] Smallest Possible Earth Impact Crater?

[Charles O';Dale]

I am seeking advice on a "small" problem. I am trying to determine what the 
smallest possible impact crater on earth would be. In other words, we have to 
determine the smallest size of a bolide that would impact earth at cosmic 
velosities (>12 km/sec) to create such a structure. Or, the largest size of a 
bolide that would be slowed to terminal velosity by our atmosphere (and not 
creating a "crater").

The answer may help in adding information to the "enigma" of the Merewether 
structure, could it be an impact related crater?

http://epod.usra.edu/archive/epodviewer.php3?oid=315776

Chuck
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html

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Re: [meteorite-list] A possible impact crater for the 1908

[Charles O';Dale]

>Date: Sat, 23 Jun 2007 10:36:59 -0400
> From: "Pete Pete" <[EMAIL PROTECTED]>
> Subject: Re: [meteorite-list] A possible impact crater for the 1908 
> TunguskaEvent
> Hi, Charles,
> I'm sure I am not the only one on the List that would be very interested in 
> hearing your personal opinion regarging this.
> Cheers,
> Pete


All I will say is that I will go where the evidence leads me. So far, there is 
NO concrete evidence of an impact event at Lake Cheko. The evidence required is 
listed at:

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/intro.html

>From the erosion and sediment deposits that have happened in that area, it 
>looks like the only way we may get this evidence is by drilling similar to the 
>drilling at Brent that revealed evidence of an impact:

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/brent/index.html

To conclude, I would put Lake Cheko in the same league as Merewether. The shape 
of the structures strongly insinuates a possible impact event but the hard 
evidence is not there or is inconclusive.

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/merewether/index.html

Just my opinion.
Chuck


  From: "Charles O'Dale" <[EMAIL PROTECTED]>
  To: 
  Subject: [meteorite-list] A possible impact crater for the 1908 
  TunguskaEvent
  Date: Fri, 22 Jun 2007 14:14:30 -0400

  
http://www.blackwell-synergy.com/doi/full/10./j.1365-3121.2007.00742.x?cookieSet=1

  FYI

  Charles O'Dale
  President
  RASC - Ottawa Centre
  http://www.ottawa.rasc.ca/index.php
  http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html


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[meteorite-list] A possible impact crater for the 1908 Tunguska Event

[Charles O';Dale]

http://www.blackwell-synergy.com/doi/full/10./j.1365-3121.2007.00742.x?cookieSet=1

FYI

Charles O'Dale
President
RASC - Ottawa Centre
http://www.ottawa.rasc.ca/index.php
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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Re: [meteorite-list] NEW 'NATURAL HISTORY" MUSEUM IS OPENING

[Charles O';Dale]

The Royal Astronomical Society of Canada - Ottawa Centre, has posted a 
"position statement" in our attempt to stem the creationist nonsense freely 
flowing in up here in Canada:

http://www.ottawa.rasc.ca/science/index.html

Charles O'Dale
President
RASC - Ottawa Centre
http://www.ottawa.rasc.ca/index.php
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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[meteorite-list] Shatter-cones on Itokawa

[Charles O';Dale]

http://www.space.com/php/multimedia/imagedisplay/img_display.php?pic=070419_ito_rocks_02.jpg&cap=A+close-up+of+larger+sized+regolith+on+the+surface+of+Itokawa.+They+are+weakly+organized+in+a+way+that+points+toward+the+upper-right+corner+of+the+image.+Credit%3A+Univ+Tokyo%2FJAXA

Some of these rocks "look like" they have the shatter-cone pattern on them.

Compare to a Manicouagan shatter-cone.

http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/manicouagan/21_memory_bay_south_1a.jpg

Chuck
Charles O'Dale
President
Ottawa RASC
http://www.ottawa.rasc.ca/index.php
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html


  -Date: Thu, 19 Apr 2007 18:03:40 -0400
  From: Mal Bishop <[EMAIL PROTECTED]>
  Subject: [meteorite-list] Asteroid Jiggles Like a Jar of Mixed Nuts
  To: meteorite-list@meteoritecentral.com
  Message-ID: <[EMAIL PROTECTED]>
  Content-Type: text/plain; format=flowed; charset=us-ascii





  "Like a jiggled jar of mixed nuts, shaking on the near-Earth asteroid 
  Itokawa is sorting loose rock particles
  on its surface by size, causing the smallest grains to sink into 
  depressions, a new study suggests. ..."

  http://www.space.com/scienceastronomy/070419_shaking_asteroid.html



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[meteorite-list] CAI in Tagish Lake?

[Charles O';Dale]

A CAI in a carbonaceous chondrite?

http://ca.pg.photos.yahoo.com/ph/voltage_contrast/album?.dir=/bd24re2

Comments are welcome!

Charles O'Dale
President
Ottawa RASC
http://www.ottawa.rasc.ca/index.html
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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[meteorite-list] CAI in Tagish Lake?

[Charles O';Dale]

A CAI in a carbonaceous chondrite?

http://ca.pg.photos.yahoo.com/ph/voltage_contrast/album?.dir=/bd24re2

Comments are welcome!

Charles O'Dale
President
Ottawa RASC
http://www.ottawa.rasc.ca/index.html
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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[meteorite-list] Earth Picture of the Day - Impact Sites

[Charles O';Dale]

FYI.
 
http://epod.usra.edu/archive/epodviewer.php3?oid=328672
 
http://epod.usra.edu/archive/epodviewer.php3?oid=324896
 
http://epod.usra.edu/archive/epodviewer.php3?oid=315776
 
Charles O'DaleMeeting ChairOttawa 
RASChttp://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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[meteorite-list] Ground Exploration of the Manicouagan Impact Structure

[Charles O';Dale]

My report on our ground exploration of the 
Manicouagan Impact Structure can be viewed at:
 
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/manicouagan/index.html
 
Chuck
 
Charles O'DaleMeeting ChairOttawa 
RASChttp://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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[meteorite-list] Slate Island Impact Structure

[Charles O';Dale]

FYI, my report on our ground explorations of the 
Slate Island impact structure may be viewed at:
 
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/slate_islands/index.html
 
Chuck
 
Charles O'DaleMeeting ChairOttawa 
RASChttp://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
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[meteorite-list] Re:New Impact Crater

[Charles O';Dale]

AL:
 
Have a look at:
 
http://www.shattercones.biz/ifsgforum/
 
and 
 
http://web.eps.utk.edu/ifsg.htm
 
... that may be of interest for you.
 
Chuck
 
Charles O'DaleMeeting ChairOttawa 
RASChttp://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html
 
*
 
Date: Mon, 14 Aug 2006 19:21:59 -0400From: almitt <[EMAIL PROTECTED]>Subject: 
[meteorite-list] New Impact CraterTo: meteorite-list@meteoritecentral.comMessage-ID: 
<[EMAIL PROTECTED]>Content-Type: 
text/plain; charset="us-ascii"Try Again.Greetings,Anyone 
interested in new meteorcraters should check this link out. Not only a new 
one but from acometary impact. Nice for the researcher to post it on a forum 
rather than the usual circles. You bethe judge.http://www.nuggetshooter.ipbhost.com/index.php?s=f9ca307aeb60243c16bc1d5350182090&showtopic=7651AL 
Mitterling
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[meteorite-list] Merewether Crater

[Charles O';Dale]

FYI, I have just posted a new article on the Merewether (potential) impact 
crater:


http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/merewether/index.html

Also, please note the new URL for the main crater website on my signature.

Thanks
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html

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[meteorite-list] Re: Impact Structures - Simple vs Complex?

[Charles O';Dale]

Jeff:

A general "rule of thumb" RE: crater characteristics:

TRANSITION BETWEEN SIMPLE - COMPLEX

Moon - 15 km
Mercury and Mars - 7 km
Earth - 3 to 5 km

 but the correct answer is "it depends".

I tried to answer this question at:

http://www.ottawa.rasc.ca/astronomy/earth_craters/intro.html

Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html



Date: Wed, 15 Mar 2006 23:01:29 +1100
From: "Jeff Kuyken" <[EMAIL PROTECTED]>
Subject: [meteorite-list] Impact Structures - Simple vs Complex?
To: "Meteorite List" 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="Windows-1252"

Here's a question for those of you more familiar with impact structures on
Earth. I believe I saw somewhere that craters fall into 2 main categories?
simple and Complex with the later having a central uplift, concentric 
rings,

etc among other things.

My question is: How small can a complex crater be? Is there a definitive
size restraint or does it completely depend on a multitude of variables 
such

as the make-up of the impacting body, velocity, impact angle, target rock,
etc?

Any help is appreciated,

Jeff Kuyken
Meteorites Australia
www.meteorites.com.au




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[meteorite-list] Darwin Glass - Darwin Crater

[Charles O';Dale]

I am trying to find an image of the Darwin Crater, the supposed source of 
Darwin Glass. The only map of the area I found is at:


http://arts.anu.edu.au/arcworld/resources/papers/paapapers/mcn1994.htm

.. and wouldn't you know it, the lat/long of the crater (S 42* 18'  E 145* 
40') on google earth is cloud covered!


Anyone? My airplane doesn't have the range for me to go down there and 
look!!


Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html


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[meteorite-list] Metal Impactor (Bolide?)

[Charles O';Dale]

http://www.avweb.com/eletter/archives/avflash/580-full.html#191612

FYI

Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

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[meteorite-list] Sudbury MRIMB

[Charles O';Dale]

Cj:

Have a look at:

http://www.ottawa.rasc.ca/astronomy/earth_craters/sudbury/index.html

Let me know if that helps you.

Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

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[meteorite-list] Re: Stones From The Stars: The UnsolvedMysteries of Meteorites

[Charles O';Dale]

I have to admit that I can thank good old Erich Von Daniken for initiating 
me into the realm of the skeptic. I fell for his "Chariots of the Gods" 
nonsense hook line and sinker, and I was just beginning my engineering 
career. What changed my opinion? An article in (of all things) Playboy Mag.


Playboy hired the then (almost) unknown Timothy Ferris to interview Eric for 
the "Playboy Interview" column. Timothy virtually exposed all of Eric's 
wacko ideas and his lack of empirical evidence (Eric actually made up most 
of it up). I was astonished that I could have fallen for stuff like that. 
Thus began my sub-career as a skeptic and my requirement for empirical 
evidence of "claims".  And I still read Playboy for its scientific articles.


Chuck
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

- Original Message - 
From: "Axel Emmermann" <[EMAIL PROTECTED]>


Subject: RE: [meteorite-list] Re: Stones From The Stars: The 
UnsolvedMysteries of Meteorites




Oh yes!
That gave me flashback... wow... still dizzy from it ;-)))

Back in the fifties to late sixties there was several hypes created around
some books that were written by pseudo-scientists like Immanuel Velikovsky
or even a reporter named Erich Von Daniken.

> 


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[meteorite-list] Re: Stones From The Stars: The Unsolved Mysteries of Meteorites

[Charles O';Dale]

Could you save me $0.50 and tell me the "unthinkable conclusion"?

Thanks
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html


From: "MARK BOSTICK" <[EMAIL PROTECTED]>
Subject: RE: [meteorite-list] Stones From The Stars: The Unsolved
Mysteries ofMeteorites





From Dust jacket:





 As speculative and adventurous as Chariots of the
Gods?, as richly documented as The Bermuda Triangle, STONES FROM THE STARS
is a riveting work of fact that serves up dozens of genuine cosmic 
mysteries

- and one single, unthinkable conclusion."



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[meteorite-list] Re: Minimum crater size for central uplift ?

[Charles O';Dale]

Michel:

IMHO, "it all depends". From my research, the best I could come up with:

quoted from my web-site: 
http://www.ottawa.rasc.ca/astronomy/earth_craters/intro.html


"In this article, I will present the craters that I have explored in the 
order of their size, starting with simple craters, moving to complex craters 
and finishing with multiring basins. The transition size between simple to 
complex craters is 2km in sediments and 4km in crystalline rocks. The 
transition size between complex to ringed basin craters is 10 to 50 km."


I would love more input on this.

Thanks
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html





Date: Sun, 13 Nov 2005 17:05:06 +0100
From: "michel  FRANCO" <[EMAIL PROTECTED]>
Subject: [meteorite-list] Minimum crater size for central uplift ?
To: 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"

Dear list

I was wandering what is the minimum size of terrestrial impact crater
that show a central uplift.
Best regards

Michel FRANCO
IMCA 3869




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[meteorite-list] Meteorite Magazine Last issue

[Charles O';Dale]

When I read the letter from Christine and her generous offer to ensure that 
everyone would get a refund, I immediately sent to her that consider my 
account paid in full to use whatever is left over for her's and Joel's 
recovery.


Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html



Date: Fri, 11 Nov 2005 11:57:12 -0500
From: [EMAIL PROTECTED]
Subject: [meteorite-list] Meteorite Magazine Last issue Letter
To: meteorite-list@meteoritecentral.com
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"; format=flowed

Hi All,


I just recieved my last issue of meteorite magazine. It was with great
sadness that I read about Dr.Joel Schiff's illness.

I personally would like to donate any refund that I have coming back to
Dr. Schiff and his family in recognition of his dedication and a job
well done.

I was wondering if other list members think it would be a good idea to
start a Master list of names of others who wish to donate their
refunds. Or  would it be best to email Dr. Schiff directly?



Sonny



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[meteorite-list] Thank You JOEL and My Best Wishes

[Charles O';Dale]

Joel:

I want to thank you for the effort you give us to deliver a quality 
publication over these past years.


You always answered my e-mails, and I thank you for that. And especially you 
gave me the benefit of the doubt by publishing a series of my articles on 
meteorite craters. For that I sincerely thank you.


My thoughts are with you and wish you a speedy recovery.

Yours
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

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[meteorite-list] Kansas: Creation, Evolution and Intelligent Design

[Charles O';Dale]

This is well worth the read to get an idea what science is up against. FYI:
Why do scientists get so angry when dealing with ID proponents?
http://www.csicop.org/list/listarchive/msg00482.html
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html
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Re: [meteorite-list] (refute) An alternative origin of tektites

[Charles O';Dale]

. The reason for this is that it isn't 
friction, but ram pressure that heats the meteoroid. When a gas is 
compressed it gets hot, like when a bicycle pump is vigorously used to 
inflate a tire. A meteoroid, moving at 33,500 mph (15 kilometers a second) 
or more compresses the air in front of it violently. The air itself gets 
very hot, which is what heats the meteoroid and melts the outer skin. This 
molten skin is immediately blown away from the main bolide body, thus the 
internal temperature of the meteorite is kept constant (leaving the internal 
argon unmolested). And, just my opinion, if an object totally melts (to 
reset its atomic clock) while traveling at 12 km/sec through our atmosphere, 
I cannot imagine it retaining any mass at impact. Look what happens to 
meteors. It has been accepted that the K-Ar clocks of the tektites were 
reset upon their respective bolide's impact and within the terrestrial 
impact melting process.

Charles O'Dale 08 November 2004


Date: Wed, 30 Mar 2005 01:02:51 -0700
From: "Graham Christensen" <[EMAIL PROTECTED]>
Subject: Re: [meteorite-list] An alternative origin of tektites
To: 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Really? I don't know a lot about tektites so I just assumed the guy would
have done his research. What kind of emperical evidence do you have that
refutes it?
Interested in learning more,
Graham
~
Graham Christensen
[EMAIL PROTECTED]
http://www.geocities.com/aerolitehunter
msn messenger: [EMAIL PROTECTED]
- Original Message - 
From: "Charles O'Dale" <[EMAIL PROTECTED]>
To: 
Sent: Monday, March 28, 2005 6:27 PM
Subject: Re: [meteorite-list] An alternative origin of tektites


I had replied to the author of that piece of pseudoscience refuting all of
his points. He answered once with more pseudoscience. I refuted his reply
and have not heard from him since. The article was full of "it could have
happened this way" without the empirical evidence to back it up.
I had complained to the editors of the RASC journal regarding the lack of
screening of their articles. Got lip service from them. I was shocked 
that
a reputable journal from the RASC would publish an article that could be
refuted so easily with empirical evidence. It showed a complete lack of
scientific research on articles received.

I can forward the word file of my correspondence to anyone who is
interested.
Cheers
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html
Message: 8
Date: Sat, 26 Mar 2005 04:00:33 -0700
From: "Graham Christensen" <[EMAIL PROTECTED]>
Subject: [meteorite-list] An alternative origin of tektites
To: 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I read an article in the Royal Astronomical Society of Canada journal
that
said that the Earth once had a ring of tektites or a system of rings
around
it and when the supercontinent pangea formed, the earth's gravitational
field became lop-sided and the tektite material in the ring ended up in
an
orbital resonance with pangea and the tektites formed a clump or "ring
arc"
that was directly over pangea at perigee. When pangea broke up, the
resonance dissapeared and the ring arc's orbit began to decay The shape
and
distribution of the australasian tektite strewnfield and the ablasion
characteristics of the tektites is consistent with a ring arc's orbit
decaying and eventually bringing the material crashing to earth at a low
angle.
Furthermore, the tektites associated with the chesapeake bay crater may
infact have been dragged down by the impactor's gravitational field as 
it
passed through or near the rings and this may be the case with other
tektite
fields as well.

I have the article here on paper but I can't find it on the internet. 
I'm
not sure if this has been posted before but if anyone's interested I
could
type up the text and E-mail it to the list.

~
Graham Christensen
[EMAIL PROTECTED]
http://www.geocities.com/aerolitehunter
msn messenger: [EMAIL PROTECTED]
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Re: [meteorite-list] An alternative origin of tektites

[Charles O';Dale]

I had replied to the author of that piece of pseudoscience refuting all of 
his points. He answered once with more pseudoscience. I refuted his reply 
and have not heard from him since. The article was full of "it could have 
happened this way" without the empirical evidence to back it up.

I had complained to the editors of the RASC journal regarding the lack of 
screening of their articles. Got lip service from them. I was shocked that a 
reputable journal from the RASC would publish an article that could be 
refuted so easily with empirical evidence. It showed a complete lack of 
scientific research on articles received.

I can forward the word file of my correspondence to anyone who is 
interested.

Cheers
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html
Message: 8
Date: Sat, 26 Mar 2005 04:00:33 -0700
From: "Graham Christensen" <[EMAIL PROTECTED]>
Subject: [meteorite-list] An alternative origin of tektites
To: 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I read an article in the Royal Astronomical Society of Canada journal that
said that the Earth once had a ring of tektites or a system of rings 
around
it and when the supercontinent pangea formed, the earth's gravitational
field became lop-sided and the tektite material in the ring ended up in an
orbital resonance with pangea and the tektites formed a clump or "ring 
arc"
that was directly over pangea at perigee. When pangea broke up, the
resonance dissapeared and the ring arc's orbit began to decay The shape 
and
distribution of the australasian tektite strewnfield and the ablasion
characteristics of the tektites is consistent with a ring arc's orbit
decaying and eventually bringing the material crashing to earth at a low
angle.

Furthermore, the tektites associated with the chesapeake bay crater may
infact have been dragged down by the impactor's gravitational field as it
passed through or near the rings and this may be the case with other 
tektite
fields as well.

I have the article here on paper but I can't find it on the internet. I'm
not sure if this has been posted before but if anyone's interested I could
type up the text and E-mail it to the list.
~
Graham Christensen
[EMAIL PROTECTED]
http://www.geocities.com/aerolitehunter
msn messenger: [EMAIL PROTECTED]

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[meteorite-list] The Birth of Chondrules

[Charles O';Dale]

RE: Dating of Chondrules
I am researching the absolute ages of chondrules, specifically;
Within average chondrites, are all the chondrules the same age or do they 
vary? If so, by how much?

Thanks in advance
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html (Pingualuit 
Crater updated)


Date: Fri, 11 Mar 2005 15:17:53 -0500
From: "Anita Westlake" <[EMAIL PROTECTED]>
Subject: [meteorite-list] The Birth of Chondrules
To: 
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
Check out this article on the birth of chondrules:
http://www.rednova.com/news/display/?id=132866
Anita D. Westlake
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[meteorite-list] RE: NWA 12-18-1950 CHUBB Crater Discovered

[Charles O';Dale]

In 1966, 1986 and 1988, impact melt samples were recovered from the crater 
area. 40Ar-30Ar dating gives an impact date of 1.4 +/1 0.1 Ma.

REF:
Impact melt rocks from New Quebec Crater, Quebec, Canada - Richard Grieve, 
Richard Bottomley, Michel Bouchard etc (1990)
Authentication controversies and impactite petrography of the New Quebec 
Crater - Ursula Marvin, David Kring (1992)

The crater is renamed (again) - Pingualuit
http://www.ottawa.rasc.ca/astronomy/earth_craters/pingualuit/index.html
Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

Date: Mon, 17 Jan 2005 17:29:30 -0600
From: "MARK BOSTICK" <[EMAIL PROTECTED]>
Subject: [meteorite-list] NWA 12-18-1950 Chudd Crater Discovered
To: meteorite-list@meteoritecentral.com
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed
Paper: Reno Gazette
City: Reno, Nevada
Date: Monday, December 18, 1950
Page: 4
Meteorite Crater? Stories of Skies
By J. HUGH PRUETT
Astronomer, Extension Division,
Oregon Migher Education System
Huge depressions surrounded by high rims of broken rock and situated 
on
otherwise level plains have been found In several places on the earth. In
recent times it seems certain that these have been blasted out by the
descent of stony or metallic missiles from the great inter-planetary 
spaces.
The best known of about a dozen such holes is the famous Barringer
Meteorite crater in Arizona, an almost circular depression approximately
4000 feet across. The top of the rim varies from 120 to 160 feet above the
surrounding plain and the inside floor is about 600 feet below the rim.
Terrific upheaval of the original strata occurred at the time of impact 
for
huge boulders, some as large as an ordinary house, make up a considerable
part of the rim. In the rim and scattered for miles around on the plain,
tons of metallic meteorites have been found.
Now we learn of another crater, recently discovered in the
north-western part of Quebec sound of Baffin Island, which dwarfs
considerably the Arizona depression. It is about 2 ½ miles across from rim
to rim, and the top of the rim stands 550 feet above the plain. Unlike the
Arizona crater, this latest depression contains a lake, the surface of 
which
is somewhat higher than the surfaces of the numerous small lakes in the
surrounding plain. Last June when it was first examined by a scientific
expedition, the water surface in places was covered by ice three feet 
thick.
It is said that this crater, which is located in an unfrequented part
of the world, was first noted on aerial photographs by a prospector Fred 
W.
Chubb. This was reported to the Globe-Telegram of Toronto. This paper was
instrumental in organizing a scientific expedition, which included Dr. V.
Ben Meen of the Royal Ontario museum.
Although no meteorites have been found among the boulders of rim or on
the surrounding plain during the short preliminary investigation, Dr. Meen
feels quite certain the formation is due to the action of a huge meteorite
and is not volcanic in nature. He believes the tearing from the plain of
likely ten billions of tons of granite which forms the rim, took place
sometime between 1000 and 3000 B.C.  Further study is planned next summer
when magnetic methods will be used to try to locate meteoritical material
and to determine if a large mass is likely beneath the lake. The 
scientists
are sure no glacial action has taken place since the crater was formed.
The explorers hoped they were the first campers ever in that locality,
but the finding of a tin can blasted their hopes. One member in anger 
threw
it away. Later when they wanted to see if it contained a message, they 
could
not find it.
Excellent pictures of the crater and the exploring party are carried 
in
the October number of Griffith Observer published in Los Angeles. Time for
Aug. 14 and other publications discussed the subject.

(end)
Clear Skies,
Mark Bostick
Wichita, Kansas
http://www.meteoritearticles.com
http://www.kansasmeteoritesociety.com
http://www.imca.cc
http://stores.ebay.com/meteoritearticles
PDF copy of this article, and most I post (and about 1/2 of those on my
website), is available upon e-mail request.
The NPA in the subject line, stands for Newspaper Article. The old list
server allowed us a search feature the current does not, so I guess this 
is
more for quick reference and shortening the subject line now.


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[meteorite-list] Genisis Crash

[Charles O';Dale]

We all are hoping that a significant amount of science can still be salvaged 
from the Genisis Probe. But, the crash did give us a great science 
demonstration!

At approximately 300 km/hr at impact, the probe gave us a great 
demonstration of what the terminal velosity of a meteorite is (after 
atmosphere penetration had eliminated its cosmic velosity )!

Chuck
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html
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[meteorite-list] Transit of Venus

[Charles O';Dale]

Skies were clear (for a change) here in Ottawa, Canada. We (the Ottawa RASC)
had a great view of the event.

One thing that struck me was that I could resolve the planet with my naked
eye (with proper filtering of course!). I am impressed by the (large)
relative size of Venus when viewed from earth.

Chuck O'Dale
Ottawa
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

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[meteorite-list] Sudbury Onaping query

[Charles O';Dale]

Dave:

From: Isotopic evidence for a single impact melting origin of the Sudbury
Igneous Complex, A.P. Dickin it al., "Based on the available isotopic and
geochemical data, it is suggested that the SIC resulted from a single impact
melting event that gave rise to the whole complex entirely from crustal
sources." IE: no bolide material survived the impact.

Hope this helps.

Roman:

The carbon (soot) that was found in the crater and dated to the time of
impact was an enigma as there was no life on land 1.8 billion years ago at
the time of the Sudbury impact.



[hypothesis] A biogenic origin of the carbonaceous material (soot) found in
the black Whitewater Group is theoretically caused by the
evaporation/condensation from the hot impact fireball and/or from a later
global cloud.



Chuck

http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

PS: I will be publishing an article on my exploration trip through the
Sudbury Impact structure later in the spring.


> Message: 12
> Reply-To: "Roman Jirasek" <[EMAIL PROTECTED]>
> From: "Roman Jirasek" <[EMAIL PROTECTED]>
> To: "Dave Harris" <[EMAIL PROTECTED]>
> Cc: <[EMAIL PROTECTED]>
> Subject: Re: [meteorite-list] Sudbury Onaping query
> Date: Tue, 30 Mar 2004 20:50:59 -0500
>
> Hi Dave
>
> I see you received no posts from the list yet.
>
> The Sudbury crater was introduced to me around 5 years ago. It's
> funny because some of local people living right in the crater do not know
> they are living in a crater. The visual area is very different than what I
> am used to, so I found the place quite intriguing.
>
> I probably have no real answers for you about your question, but I did
> find out that there are reports of extra-terrestrial carbons in the black
> onaping.
> That means something burned up that was NOT from Earth, agreed?
>
> I can also tell you that I have seen many kilos of cut slabs of onaping,
and
> some have glassy inclusions, others include highly magnetic areas. You
could
> get a large slab and roll a small 1/4" round earth magnet ball to find the
> attractions.
>
> Other than the beauty of the slices and the history, I really can't help
> you.
> Did you read this part of my site? It may help a bit more, but the author
> does not
> include references unfortunately!
>
>  http://www.meteoritelabels.com/Astrobleme.html
>
> Best regards,
> Roman Jirasek
> www.meteoritelabels.com
>
>
>
>
> - Original Message -
> From: "Dave Harris" <[EMAIL PROTECTED]>
> To: "metlist" <[EMAIL PROTECTED]>
> Sent: Monday, March 29, 2004 2:46 PM
> Subject: [meteorite-list] Sudbury Onaping query
>
>
> > Hi,
> > this month's MAPS has an interesting article (not too technical for a
> > change!) on the The role of meteorite impact as a normal geological
> process
> > (Bevan French of the dept of mineral science at the Smithsonian).
> > Reading about  Onaping I was wondering if anyone knew whether or not
there
> > are any traces of meteoritic material in this suevite?
> >
> > thanks
> >
> > dave
> >
> > IMCA #0092
> >
> >


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[meteorite-list] Re: Meteorite-list digest, Vol 2 #199 - 10 msgs

[Charles O';Dale]

Dave:

From: Isotopic evidence for a single impact melting origin of the Sudbury
Igneous Complex, A.P. Dickin it al., "Based on the available isotopic and
geochemical data, it is suggested that the SIC resulted from a single impact
melting event that gave rise to the whole complex entirely from crustal
sources." IE: no bolide material survived the impact.

Hope this helps.

Chuck

http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

> Message: 4
> Date: Mon, 29 Mar 2004 20:46:19 +0100 (GMT Daylight Time)
> From: "Dave Harris" <[EMAIL PROTECTED]>
> To: "metlist" <[EMAIL PROTECTED]>
> Subject: [meteorite-list] Sudbury Onaping query
>
> Hi,
> this month's MAPS has an interesting article (not too technical for a
> change!) on the The role of meteorite impact as a normal geological
process
> (Bevan French of the dept of mineral science at the Smithsonian).
> Reading about  Onaping I was wondering if anyone knew whether or not there
> are any traces of meteoritic material in this suevite?
>
> thanks
>
> dave
>
> IMCA #0092
>
>


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Re: [meteorite-list] RE:Hudson Bay Arc

[Charles O';Dale]

Charly V:

In my article on the Clearwater West crater I do refer to the Hudson's Bay
arc.

http://www.ottawa.rasc.ca/astronomy/earth_craters/clearwater_west/index.html

The input I received from geologists during my research is that the
structure is the result of a "mantle-plume uplift. The analogy would be, if
you press a table tennis ball enough to cause a dent, it is almost perfectly
circular. The same effect happened at Hudson's Bay when the mantle plume
collapsed.

Or so the latest theory goes.

Below is the quote from my article and the paper it is based on.


.
To the west of the Clearwater Craters is the east coast of Hudson Bay. This
circular coast is the result of a mantle-plume uplift, and IS NOT the result
of an impact event.
The arc of the east coast of Hudson Bay is illustrated in the upper left of
this shuttle picture. Richmond Gulf is immediately to the right of the
semi-circular shaped coast and Clearwater West meteorite crater is the
circular shape in the center of the picture. (courtesy NASA)
  1.. The sedimentary record of mantle-plume uplift", Robert H. Rainbird,
Richard E. Ernst; Geological Society of America Special Paper 352, 2001.
  2.. Negative results were reached by R. S. Dietz and J. P. Barringer in
1973 in a search for evidence of impact in the region of the Hudson Bay arc.
They found no shatter cones, no suevite or unusual melt rocks, no radial
faults or fractures, and no metamorphic effects. They pointed out that these
negative results did not disprove an impact origin for the arc, but they
felt that such an origin appeared unlikely.


.
Chuck
Ottawa

- Original Message - 
From: "Charles R. Viau" <[EMAIL PROTECTED]>
To: "'Charles O'Dale'" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Sunday, September 28, 2003 10:06 PM
Subject: RE: [meteorite-list] RE: NP Article, 12-1950 Meteorite Crater Found
in Canada


> Waiting for the day that some news comes of the ongoing investigations
> in Hudson Bay, that huge half circle that comprises part of the bay is
> striking in its uniformity. If it turns out to be an astroblehme , it
> would certainly be the largest ever found. If not, it is the closest
> nature has ever come to eroding out an almost perfect half circle in a
> coastline. The last I heard about this suspected impact site, was a 3
> year old article published by the Canadian Geologic Survey, saying that
> it was very difficult drilling core material up there, and it may take a
> long time before any kind of analysis is available. I also got the
> impression that they were having a hard time funding the work to be
> done. I also heard that there was a larger unconformity in the land mass
> around the coast (rim?) but there was no definitive evidence that it was
> caused by an impatct as yet. Anyone know of the principles involved in
> this search, or any new news?
>
> CharlyV IMCA_4351
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Charles
> O'Dale
> Sent: Sunday, September 28, 2003 7:41 AM
> To: [EMAIL PROTECTED]
> Subject: [meteorite-list] RE: NP Article, 12-1950 Meteorite Crater Found
> in Canada
>
> Please see my article on the Chubb Crater aka New Quebec Crater aka
> Pingualuit Crater at:
>
> http://www.ottawa.rasc.ca/astronomy/earth_craters/pingualuit/index.html
>
> Thanks
> Chuck
>
>
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>
>


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[meteorite-list] RE: NP Article, 12-1950 Meteorite Crater Found in Canada

[Charles O';Dale]

Please see my article on the Chubb Crater aka New Quebec Crater aka
Pingualuit Crater at:

http://www.ottawa.rasc.ca/astronomy/earth_craters/pingualuit/index.html

Thanks
Chuck


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[meteorite-list] RE: impact area (a hobby of mine actually)

[Charles O';Dale]

At the risk of being accused of blowing my own horn, please check out:

http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html

Chuck O'Dale
Ottawa


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Re: [meteorite-list] Test crater aerial photo

[Charles O';Dale]

http://priede.bf.lu.lv/GIS/Descriptions/Remote_Sensing/An_Online_Handbook/Sect18/nicktutor_18-6.shtml
 
The author, N.M. Short, states that "The tiny 
crater was produced by a chemical explosion as part of an experiment to 
duplicate on a small scale the Meteor Crater itself."
 
Chuck

  - Original Message - 
  From: 
  Matson, Robert 
  To: 'J. Fox' ; Meteorite-list 
  Sent: Thursday, October 17, 2002 10:56 
  PM
  Subject: [meteorite-list] Test crater 
  aerial photo
  Here's a link to an aerial view of the test crater to the SSW 
  ofMeteor Crater:The 
  much smaller test crater is at about the 7 o'clock positionrelative to the 
  "real" crater.  --Rob-Original Message-From: J. Fox 
  [mailto:[EMAIL PROTECTED]]Sent: Thursday, October 17, 2002 8:46 
  PMTo: Meteorite-listSubject: [meteorite-list] Possible 
  CraterKim,If this crater is to the SW of Meteor Crater, then 
  it is a test craterthat was created to see what the results would be in 
  similar stratawhen it was blown outward by conventional explosives.  
  I don'tremember the specifics, but have seen high altitude photos of it 
  andread about its creation.  Other list members may have further 
  info.Regards,Jon 
  Fox__Meteorite-list 
  mailing list[EMAIL PROTECTED]http://www.pairlist.net/mailman/listinfo/meteorite-list

[meteorite-list] Ontario Meteorites

[Charles O';Dale]

FYI, for the record.
http://www.ontariominerals.com/meteorites.htm
Chuck
 
 

[meteorite-list] Murchison

[Charles O';Dale]

Bernd:
 
I found the Murchison article fascinating! Thank 
you. 
 
A bit off topic, but regarding the left/right 
distribution of organic molecules in the meteorite, is there a theory on why 
life on earth contains predominantly left handed molecules?
 
Thank you
Chuck