Certainly the best collection of observations set to text I've seen. Thanks
for digging up the details Fred. This also goes into detail as to the kind of
structures that can be seen over the various faces of the meteoroids
orientations.
One exception: Yes glassy is a term used to describe
Hi list, Tom Phillips here, I have some crust micrographs taken in
reflected cross polarized light of a thick slice of NWA 2371 an H4. The
heating/cooling caused the crust to crystallize like nothing I have seen
before.
I haven't posted them to the Gallery yet but it is well worth the
Taking time out during my expedition to the
Wetumpaka astrobleme...
--- [EMAIL PROTECTED] wrote:
The heating/ cooling caused the crust to crystallize
like nothing I have seen before...
Not picking on you Tom but I am using this as a segway
to speak to fusion crust again. One of the reasons I
Marcininho,
no offence, but I really doubt,
that a 5000 year old or even older, maybe glacially iron meteorite, resting
in such a wet environment can have any fusion crust left.
Dear Buckleboo
Yes its strange but I have here crust. And it is not only on this one 282g
endpiece. Go and look
Marcin sez:
If spacimen stay in my room for year and its stable, then Im sure its
stable
enough to stay stable for years. Ofcourse there could be alvays someone who
have skills to make rusty not only my morasko, but also Taza or Chinga :)
I regret to say that I am one of those people who has
Hi Marcin-ho,
Does the crust after these millenium still look like you took a high
temperature blow torch to steel and watched it turn rainbowish colores, or
are we talking about an old magnetitated surface that has been exposed to
the elements and kept certain characteristics of its original
Oops, make that desert varnish doesn't count as the original good stuff...
Hi Marcin-ho,
Does the crust after these millenium still look like you took a high
temperature blow torch to steel and watched it turn rainbowish colores, or
are we talking about an old magnetitated surface that
Oops, make that desert varnish doesn't count as the original good stuff...
Hi Marcin-ho,
Does the crust after these millenium still look like you took a high
temperature blow torch to steel and watched it turn rainbowish colores, or
are we talking about an old magnetitated surface that
Hello List,
A few comments (perhaps naive speculations) on statements by Francis
(Graham), Sterling (Webb) and Robert (Wolard) about meteorites on Mars.
1) I assume (unless I miss something important) that a meteorite falling on
Mars would not carry any kind of fusion crust because of the
En un mensaje con fecha 01/08/2004 1:08:33 PM Mexico Standard Time, [EMAIL PROTECTED] escribe:
I assume (unless I miss something important) that a meteorite falling on
Mars would not carry any kind of fusion crust because of the particular tiny
atmosphere (friction and melting minimized or nil,
i have recently purchased a portales slice from one of the dealer websites that has incredible crust. it is thick and was obviously on the back side as it appears to have melted, had some run-in and then puddled up and other pieces of the rock blown off the front then sucked back behind it into
Hi,
I have long argued for a fusion crust scale (like the weathering shock
level scale) only for specifying individual specimens
What about something like an 0-6 'FC' scale (FC=Fusion Crust)
FC 0 for none
1 ~Tiny Piece of crust
2 ~33%
3 ~50% Fusion Crust
4 ~66%
5 ~83%
6
Hi,
Regarding Fusion Crust; I have long argued for a 'fusion crust scale'
(like the weathering shock level scale) only for specifying individual
specimens
What about something like an 0-6 'FC' scale (FC=Fusion Crust)
FC 0 for none
1 ~Tiny Piece of crust
2 ~33%
3 ~50% Fusion Crust
-
From:
mark ford
To: [EMAIL PROTECTED]
Sent: Tuesday, December 02, 2003 7:40
PM
Subject: [meteorite-list] crust % ?
Hi,Regarding Fusion Crust; I have long
argued for a 'fusion crust scale'(like the weathering shock level
scale) only for specifying individualspecimensWhat
That sounds good but there are so many degrees of crust. Thick primary,
double thick primary, primary ranging into secondary with metallic splatters
and thin secondary that ranges suddenly into a zero crust pristine matrix.
Fine misty crust mixed with matrtix and metal that that fogs over the
Bill,
Yes, but when people sell 'Individual's' they 'usually' only specify the
Primary and Secondary fusion crust in %. I agree you can have many
variations and one could write a whole page describing fusion crust of
any individual meteorite but everything will fall into the 6 categories.
(It's
Hi,
I'm would guess that when dealers say a certain percentage of crust,
they're using the old eyeball-meter.
Human approximation for areas is fairly accurate: Who ate the last
quarter pizza? He's about 50% bald on top.
Sterling
Hello again good list, when dealers say 99% or 78% crusted for a
meteorite, is that a guess or is there a formula for getting that number?
Thanks, Tom
Peregrineflier
Yea, that's right,
The proudest member of the IMCA # 6168
__
Meteorite-list mailing
18 matches
Mail list logo
