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Photo by John Kashuba. Copyright (c) John Kashuba.
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What is a thin section? What do all the colors mean?
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Thin section in cross polarized light. Achondrite-ung
TKW 56 grams. Fall not observed. Purchased November 2003.
John writes:
Some mineral grains in NWA 7835 contain sheets of multitudes of small inclusions, perhaps empty voids. Some of these sheets are wavy like hanging curtains. When such a grain is thin sectioned the resulting sample contains a ribbon of each curtain that was sliced through. Wavy curtains give rise to wavy ribbons. Here, wavy ribbons almost look like helixes. This view is about 0.3mm wide and is in cross-polarized light.
For more information please see my article in Meteorite Times.
Click to view larger photos #1
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Michael Hofmann 5/19/2021 9:49:38 AM |
Thats really a cracy one... wow. |
Anne Black 5/16/2021 3:26:09 PM |
Yes, Graham, still one of the most amazing TS I have ever seen. |
Graham Ensor 5/16/2021 4:00:54 AM |
Wonderful image John. |
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