Hello List,
Would any members be able to help with a question I
have regarding the "impact-duration-time" (???) of
some typical falls? I don't know if that's the best
terminology to use, but what I mean is: What would be
a "typical" measure of time between the impact of the
FIRST (known) individ
Hello List,
Would any members be able to help with a question I
have regarding the "impact-duration-time" (???) of
some typical falls? I don't know if that's the best
terminology to use, but what I mean is: What would be
a "typical" measure of time between the impact of the
FIRST (known) individ
Dear List members,
Over the next five days, I have different sets of excellent auctions ending,
totaling 151 specimens. To make it easier to see the different sets ending
on the particular days, I have made links to just those days worth of
material. They are:
1) Today (Wednesday) - 59 items
On Wed, 19 Mar 2008 07:40:07 -0700 (PDT), you wrote:
>Hello List,
>
> Would any members be able to help with a question I
>have regarding the "impact-duration-time" (???) of
>some typical falls? I don't know if that's the best
>terminology to use, but what I mean is: What would be
>a "typical" me
Strewn field shape is the product of two factors: (1) the meteoroid may
break up over a long distance, and (2) individual components are
distributed by wind during cold fall. In the first case, this breakup
may cover a lot of ground, but happens while the meteoroid is still
hypersonic. So no mo
List and Darren,
Well I can already see that I probably did make a
wrong assumption. The 200mph figure probably doesn't
have anything to do with determing the duration time.
What might make a difference is if the individuals of
the fall retained any lateral differences in speed
when the point(s)
Robert,
The only timed event that I can think of that was accurately timed was the
Shoemaker-Levy
comet impact on Jupiter.
This is something I never gave any thought to. Good Luck!!
Pete
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I'm looking for a video editing volunteer.
My 2 week expedition recovering the new fall was well documented, dozens and
dozens of pictures and over 1.5 hours of video clips of interviews, relevant
scenery, daily planning, and trips to impact points.
My plan is too filter and condense all this
The only timed event that I can think of that was accurately timed was
the Shoemaker-Levy
comet impact on Jupiter.
Yeah, but that's an entirely different sort of parent than anything
we've seen on Earth, since it was fragmented into a long chain of
components _before_ it encountered Jupiter's
Consider the Fireball.
When the (soon to be) meteorite explodes into a fireball, the pieces are
blown in every direction, Those blown in the direction
that the meteor came from which should give them a negative speed and as
such will start to drop first. Those in the direction of travel give the
Robert W. wrote:
"VERY rough ESTIMATE of the spread of time by simply dividing the
length of the strewnfield by a max free fall speed of ~ 200mph??? ...
IF all the above is even halfway accurate, could one safely say that
during a "typical" fall, meteorites are impacting down the length of
the
I don't think that fireballs explode that way. What happens is that
pressure builds up until the material strength of the meteoroid is
exceeded, and it fragments. There isn't an explosion as such (the
appearance of an explosion is largely the result of energy released when
lots of additional su
Pete wrote:
"Some will be blown up and some will be blown down."
I believe this is a common misconception for many in the meteorite
community and common thought. I don't think anything is "blowing up".
Simply fragmenting. Each part of the original whole maintains its
portion of momentum u
http://www.explorernews.com/article/show/21655
Don't miss Twink's great article about the display of some of Jim
Kriegh's meteorites in Oro Valley! Best,
Doug
Kriegh's rocks from the sky on display in OV
Guest column by Twink Monrad
-
Page 78, Gujba, New Mexico ?
Nigeria,
Cheers,
Christian
I.M.C.A. #2673 at www.imca.cc
website: www.austromet.com
Ing. Christian Anger
Korngasse 6
2405 Bad Deutsch-Altenburg
AUSTRIA
email: [EMAIL PROTECTED]
email: [EMAIL PROTECTED]
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http://w
Greetings List!
I'm having difficulty locating the right piece of
Pallasite for a friend of mine who is ready to
purchase.
Exact type/fall is not the most important factor.
What is most important is aesthetic beauty and the
olivine crystals must be high quality - the piece
should be like tra
Hi All,
Ok, not "NEW" in geological terms, but new to us maybe... Just
received an email that and Australian geologist accidentally
discovered a meteorite crater in western Australia.
"Dr. Hickman, from the Geological Survey of Western Australia sent
the Google Earth picture to a colleague w
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. T
Hi Eric, his is the one Darren sent in tother day.
Jerry Flaherty
- Original Message -
From: "Eric Wichman" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, March 19, 2008 2:31 PM
Subject: [meteorite-list] New Crater Found?
Hi All,
Ok, not "NEW" in geological terms, but new to us maybe... J
http://www.sciencedaily.com/releases/2008/03/080319140319.htm
Mars, Earth And Moon From 'Unique Planetary Nursery'
Science Daily (Mar. 19, 2008) A study of meteorites suggests that Mars, the
Earth and the Moon share a common composition from growing up in a unique
planetary nursery in the inn
Hi, Greg, List, GooglEarthers,
The coordinates are are:
119.6831112903886,-23.0371,0
If you have Google Earth installed, this link:
http://bbs.keyhole.com/ubb/download.php?Number=1134293
will start Google Earth and take you there.
Doesn't look like an impact feature
to me: no raised
Dear List,
I'm a meteorite collector since 1991, and have personally witnessed the
start of the flood of Saharan meteorites. I think all these - also rare -
Saharan meteorites becoming available for us collectors, was/is very
possitive.
Collecting is investing. Every collector wants to see t
If money isn´t the most important key factor, I would suggest an ultrathin (!)
slice of Esquel or Imilac, but if money counts, I would rather suggest an
olivine-rich portion of thinly cut Seymchan. All of these are known to be quite
stable against rusting over time. Glorieta could be another goo
Hi, Grag, List,
As Jerry just pointed out, this was posted by
Darren on the 17th, headed "Possible Ancient
Impact Crater Australia" with this source:
http://www.sciencealert.com.au/news/20081803-17058-2.html
"Dr Hickman, from the Geological Survey of
Western Australia, was using Google Ear
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
>
http://www.telegraph.co.uk/earth/main.jhtml?xml=/earth/2008/03/19/scialien119.xml
Milestone in hunt for extraterrestrial life
By Roger Highfield, Science Editor
Astronomers have found organic chemicals on
a planet outside our solar system for the
first time, a milestone in the hunt for
extraterre
Hello Alex,
You are forgetting another very nice pallasite: Quijingue, the Brazilian one.
Lesser known, but just as pretty. So a good investment.
In my opinion.
Anne M. Black
_www.IMPACTIKA.com_ (http://www.IMPACTIKA.com)
[EMAIL PROTECTED] (mailto:[EMAIL PROTECTED])
Vice-President, I.M.C.A.
Also, I have seen Fukang for good prices. My piece is over 2 years old with no
rust. The olivine is stunning. I am curious of other pieces of Fukang rusting
badly?
Matt
--
Matt Morgan
Mile High Meteorites
http://www.mhmeteorites.com
P.O. Box 151293
Lakewood, CO 80215 USA
On Wed, 19 Mar 2008 21:13:42 +0100, you wrote:
>Collecting is investing. Every collector wants to see the value of his
>collection stay sable at the least.
Not me. I collect them because I want them, not because I hope to turn a profit
for them in the future. I'd be very happy if every class
My experience with Pallasites have been:
I had a piece of Fukang deteriorate in a mere six
months. Some of the crystals became dislodged while
others bulged under the pressure of rust pushing them
out. Keep in mind that I live in a moist state and
only a few hundred feet from a salt water body na
I agree with Adam, I have had bad luck with Fukang too.
Maybe it wasn't prepared correctly.
And sorry Mike, but I have always Quijingue in stock, I have only bought
pieces with nice bright crystals (take a look at my catalog), and I have had
no
rust problems with that one. Of course I am fur
Anne writes: "I have had bad luck with Fukang too."
Even though my Fukang still looks stable - I got it in 2006 - my vote is for
Esquel. I have a very thin (ca. 1-2 mm) slice with translucent olivines that
I got from Gregor Pacer about 10 years ago...not the slightest trace of rust!
I also have a
MARS RECONNAISSANCE ORBITER HIRISE IMAGES
March 19, 2008
o Yardangs in Tithonium Chasma
http://hirise.lpl.arizona.edu/PSP_007417_1755
o Layered Bedrock with Possible Hydrated Sulfates
http://hirise.lpl.arizona.edu/PSP_007403_1670
o Inverted Fluvial Channels and Craters with Ejecta Rays
h
Hi list.With all the great auctions that greg hupe is
putting up,I saw one that really caught my eye.It is
NWA 3161.I love how greg gives us the chance to buy
things right away so we do not have to wait for the
whole auction to end.I decided to use the buy it now
and buy the 15 gram slice.It is a b
Ditto, ditto and ditto.
Jerry Flaherty
- Original Message -
From: "Darren Garrison" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, March 19, 2008 6:24 PM
Subject: Re: [meteorite-list] Meteorite market trends - a critical note
On Wed, 19 Mar 2008 21:13:42 +0100, you wrote:
Collecting is i
Agreed.
-Walter Branch
- Original Message -
From: "Jerry" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>;
Sent: Wednesday, March 19, 2008 8:34 PM
Subject: Re: [meteorite-list] Meteorite market trends - a critical note
Ditto, ditto and ditto.
Jerry Flaherty
Good Evening!
There's a live broadcast in HD from the Space Station on Discovery HD
right now ... very cool!
Regards, Art
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Hi mexicodoug, et al,
Does anyone have evidence of what really happens (i.e. explode or fragment)
with meteors/meteoroids that pass through the atmosphere? I'm a newbie and
therefore not pretending to know what I'm talking about, but it would seem
to me that there are some meteors/meteroids that
Hi Bob-
Even small meteoroids don't heat up inside during their brief meteor
phase. Ablation is simply too efficient at carrying away heat. Also,
it's doubtful any significant gas pockets exist in meteoroids.
There are quite a few videos of meteors breaking up, and they don't seem
to show an
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