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| Lewis Cliff 86216 | |||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 86216 This is an OFFICIAL meteorite name. Abbreviation: LEW 86216 Observed fall: No Year found: 1986 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  6.5 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 604 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||
| Comments: | Field number: 2305 | ||||||||||||||||||||
| Writeup |
Writeup from AMN 11(1):
Sample No.: LEW86216 Location: Lewis Cliff Weight (g): 6.5 Field No.: 2305 Dimensions (cm): 1.5x1.5x1 Meteorite Type: Ureilite
Macroscopic Description: Cecilia Satterwhite The fusion crust on this specimen is black and frothy on most surfaces. The interior is dark with light-colored inclusions up to ~3 mm.
Thin Section (,2) Description: Brian Mason The meteorite is extremely weathered, and much of the section is obscured by brown limonite. It shows rounded olivine grains, up to 3 mm across, in a finer-grained, probably comminuted matrix of olivine with minor pyroxene. The probable presence of accessory diamond is indicated by difficulties in cutting and polishing, and by brightly fluorescent particles in an electron beam. The meteorite is heavily shocked, the large olivines being converted into a mosaic of tiny grains averaging 0.05 mm across. Microprobe analyses show olivine composition ranging Fa12-18, with a mean of Fa17 (CaO 0.2-0.4%); pyroxene compositions range Wo1-10Fs12-18. The meteorite is a ureilite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 3256: |
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| References: | Published in Antarctic Meteorite Newsletter 11(1) (1988), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:
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Statistics: This is 1 of 43332 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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