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Re: classification question
- To: meteorite-list@meteoritecentral.com
- Subject: Re: classification question
- From: Jeff Grossman <jgrossman@usgs.gov>
- Date: Thu, 25 Jun 1998 11:24:24 -0400
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- Resent-Date: Thu, 25 Jun 1998 12:27:37 -0400 (EDT)
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At 03:31 PM 6/25/98 +0200, you wrote:
>Hi everyone,
>
>I have a question concerning the definition of chondrite classes.
>I understood the definition of L3, L4, L5 etc., but what about the
>L3.4, L3.8 etc. (same for H and LL). What does the '.8' stand for?
>Is there a definition of these sub-classes?
>Is a L3.4 chondrite equivalent to a L3-4?
>
>Trond
No. Type 3 is now subdivided into types 3.0, 3.1,... 3.9, where
3.0 is the least metamorphosed (virtually unmetamorphosed), and 3.9
is nearly a type 4.
L3-4 either means its a breccia of types 3 and 4 material, or
transitional between 3 and 4, depending on who wrote it.
jeff