I'm not sure why you thought there was a definition that requires L5
and L6 chondrites to come from different parent asteroids... there
isn't. Questions like this are open to investigation. Isotopic data
show that the different petrologic types of L chondrites all
experienced a major shock ev
Hi Jeff, others,
certainly true as far as the majority of L-chondritic material is concerned.
But Dave’s question is in so far justified as there are several exceptional
L-chondrites that show particular differences in their lithology compared to
other L-chondrites. If my information on this su
On Tue, 8 Sep 2009 20:28:39 -0700 (PDT), you wrote:
>It is a statistical certainty that Apollo era urine is still in
>lunar and Terran orbit
When I read this last night, it made me think of a science fiction story-- but
it took me a while to track the title down. This is worth a read:
http://
http://www.google.com/hostednews/afp/article/ALeqM5hRa6u8O0ZprE7dF10g8FMNv1ERig
Patagonia site of world's biggest crater field: study
(AFP) 19 hours ago
BUENOS AIRES Argentina can lay claim to the world's largest crater field, a
volcanic area in Patagonia known as the "Devil's Slope," accord
Darren, All,
Well, have a look at the region from google earth. There are quite
literally hundreds (if not thousands) of elongate depressions that are
quite easily visible from the air. I used to spend quite a bit of
time looking for new craters on google earth, and the area really had
me stumped
On Wed, 9 Sep 2009 07:57:30 -0700, you wrote:
>literally hundreds (if not thousands) of elongate depressions that are
...
>craters noted, I found hundreds of new ones, all of which were aligned
>in-line with the original discoveries, and all of which
>lookedpretty much the same, varying only
Hi, Jeff,
Thanks for your response. I always look forward to learning something from
your posts to the list, and below I'm reminded of the dating of the L and H
shock events. Do you recall such a date for amphoterites by chance?
I followed up my question with a rather clear and somewhat self-de
Hope you've recovered from the long Labor Day weekend. I have ebay
auctions ending Saturday (beginning at 12:37 pm PDT). Up on the block
are:
NWA 869 L4-6 - cherry and oriented (w/ nice rollover lipping)
individuals
Sahara 02500 L3.8 - 154g individual (good for cutting into slices)
NWA P
Dear List Members,
I have still few meteorites for sale/trade, here a list with some
description:
- NWA Ureilite (now I am waiting for NWA number after first study), two
last huge slices 43.6 grams and 36.9 grams. This Ureilite have very nice
green, yellow olivine crystals, loots of vein like a
There are some porous chondrites but as far as I know there is no reason to
believe that they are from separate bodies. They may have suffered more (or
less) impact-induced compaction than the majority of rocks. But one should
check their cosmic-ray exposure ages, shock ages, etc. to see if th
The general supposition is that all L chondrites come from one parent body,
that H chondrites come from another, etc. We don't know this to be strictly
true, but there is evidence that it is broadly true. For example, about
two-thirds of all L chondrites (of different petrologic types) were sh
http://www.rocksfromspace.org/September_9_2009.html
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Hello Dave, Alan, and List,
Here is a paper that may be of interest with regard to LL chondrite parent
bodies:
Dixon E.T., Bogard D.D. and Garrison D.H. (2002) 40Ar-39Ar Chronology
of LL Chondrites (Lunar and Planetary Science XXXIII, 1114.pdf).
They even discuss *three* models:
1. The onion-s
This paper in Astronomy & Astrophysics may be of interest:
http://tinyurl.com/laupyx
It discusses the identification of several new, very young asteroid
families called Datura, Emilkowalski, 1992YC2, and Lucascavin clusters.
These objects are the largest members of these new families and are
Hello all,
I spent nearly 2 decades searching Glorieta for the elusive pallasite mass that
my friend, Harvey Nininger thought was still buried out there. The original
article put out by Kunz in 1885 indicated that a pallasitic mass of about 40 to
60 lbs existed as it was missing from the thre
Hi Folks!
I have some new offerings that might be of interest to some List members. :)
Scarce NASA Noblesville Lithographs -
http://www.galactic-stone.com/product/126516/Noblesville--Rare-NASA-Lithographs-of-Famous-Witnessed-Fall_974654.html
Rocks from Space signed by O. Richard Norton and Dorot
Greetings all
This didn't show up in my inbox or the archives so I will send it again. I
have a number of auctions closing shortly including
39 gram mundrabilla slice with troilite
100 gram NWA silicated iron complete slice
18.3 gram springwater pallasite from ASU (ninninger) trade.
1
Of course this abstract was superceded by the paper:
Dixon, Bogard, Garrison and Rubin (2004) 39Ar-40Ar evidence for early impact
events on the LL parent body. GCA 68, 3779-3790.
- Original Message -
From:
To:
Sent: Wednesday, September 09, 2009 9:47 AM
Subject: [meteorite-list] Cho
Bernd, Alan, and List,
Thank you both for the diplomatic and informative responses. While we're on
the subject, might one of you (or anyone else) expand on, say, the L/LL6
classification designation? Holbrook was recently moved from an L6 to such
a classification, and I have a few others in my co
John Wasson and I classified some meteorites as L/LL because we were
uncertain of their proper classification. Typical for these meteories, some
properties indicate L, some indicate LL, and some could be truly
intermediate between the established ranges. This may mean that they are
anomalous
Backing up and extending what Alan said, in current usage, a slash means
one of two things: 1) there are properties of this meteorite that are
intermediate or transitional between the two classes, or 2) The
classifier could not decide which group it was due to some kind of
limitation in methodo
Hello All,
I'm really glad that Jeff G. responded because I didn't know whether or not I
should
mention his thoughts of about 10 years ago (!) when I asked him about hyphens
and
dashes and the confusion they cause! I was inquiring about DaG 140, then
classified
as an H3.9-6.
Mon, 07 Sep 1998,
Greetings all
I have a number of auctions closing shortly including
39 gram mundrabilla slice with troilite
100 gram NWA silicated iron complete slice
18.3 gram springwater pallasite from ASU (ninninger) trade.
1.03 gram DAG 400 lunar slice
0.49 gram Vigarano
31 gram Mulga North
11.89 gram ori
Those 1998 remarks still hold true, except for one thing... we've mostly
weeded out the classifications that used a slash for breccias. There
are still some in the MetBull database, probably, but mostly they're
fixed. Breccias are still a complete mess and nothing has changed.
Jeff
bernd.pa
Oog. I agree with Bernd; classification is currently a mess. We discussed
this a couple of years ago, but it seems any clarifications are very slow to
work their way into the literature. Has the NomCom issued any official
bulletins on this?
Best!
Tracy latimer
Tracy writes:
"Oog. I agree with Bernd; classification is currently a mess."
Sorry, I forgot the inverted commas => " ... "
Those were Jeff's remarks / comments!
Bernd
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On Monday 9/7 at about noon EDT Google News published a story originating
from Bangladesh in the "Onion".
The satire had NO note to make one aware of its lack of authenticity.
It was published as FACT
Subsequently only the satirical version was available an hour or so later.
The content dealt wi
Funny.
http://www.thenewamerican.com/index.php/tech-mainmenu-30/environment/1836
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Glad some one read this post!
--
From: "Darren Garrison"
Sent: Wednesday, September 09, 2009 9:05 PM
To:
Subject: Re: [meteorite-list] Google New's boo boo
Funny.
http://www.thenewamerican.com/index.php/tech-mainmenu-30/environment/1836
___
While walking to my bus (I monitor the urchins--
opps--make that kids) on their ride home.
As I walked to the bus this one dark stone
looked "different", so I picked it up and promptly
forgot about it.
When I got home, I emptied my pockets and saw
the stone. I grabbed my standard magnet from a har
Three photos from the recently up-graded Hubble. Exposures using British e2v
Technologies HD digital film.
http://www.thesun.co.uk/sol/homepage/news/2629817/Hubbles-best-picture-yet.html
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