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| Lewis Cliff 87004 | |||||||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 87004 This is an OFFICIAL meteorite name. Abbreviation: LEW 87004 Observed fall: No Year found: 1987 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  208 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 396 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
| Comments: | Field number: 4425 | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 11(2):
Sample No.: LEW87004 Location: Lewis Cliff Weight (g): 208.4 Field No.: 4425 Dimensions (cm): 7x 6 x 4.5 Meteorite Type: Polymict Eucrite
Macroscopic Description: Carol Schwarz This eucrite is ~90% covered by black shiny fusion crust. Flow lines occur on most surfaces. There are a few pitted areas where fusion crust is absent. The interior is gray with mm-sized white clasts, 1-2 mm dark gray inclusions, and minor oxidation.
Thin Section (,2) Description: Brian Mason The section shows a microbreccia of pyroxene and plagioclase grains, up to 0.6 mm across, in a comminuted groundmass of these minerals; a few small lithic clasts are present. Microprobe analyses show pyroxene with a wide range of compositions: Wo2-27, Fs31-56, En31-61; plagioclase composition is An83-89. The meteorite is a polymict eucrite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 3582: |
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| References: | Published in Antarctic Meteorite Newsletter 11(2) (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 43857 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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