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What is a thin section? What do all the colors mean?
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Thin section in plane-polarized light. L3.4
TKW 2.6 grams. Fall not observed. Found 2009, Allan Hills, Antarctica.
Location Map of Antarctic Finds
AMN writes:
Macroscopic Description - Cecilia Satterwhite
This ordinary chondrite has a rusty exterior with brown patches of fusion crust. The interior is dark gray to black with rusty areas and some metal.
Thin Section Description (,2) - Cari Corrigan, Tim McCoy and Nicole Lunning
The section shows numerous chondrules (up to 0.9 mm across), chondrule fragments, and mineral grains in a dark brown to black matrix which contains minor amounts of nickel-iron and troilite. Brown limonitic staining pervades the section. Microprobe analyses show a range of olivine and pyroxene compositions: olivine, Fa4-37; pyroxene, Fs1-18. This meteorite is an L3 chondrite, estimated to be of subtype 3.4.
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Bernd Pauli
5/12/2013 9:12:49 AM |
An L3.4 like Gunlock, Hallingeberg, Inman, etc. Beautiful (and large) chondrules for an L-type! |
Ray Watts /# 6289
5/12/2013 8:41:18 AM |
These fine specimens are a joy to see , nice to see such Rare material , |
Simon de Boer IMCA 9708
5/12/2013 6:58:03 AM |
Thank you AMN , for sharing some Antarctic treasures |
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