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| Lewis Cliff 87254 | |||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 87254 This is an OFFICIAL meteorite name. Abbreviation: LEW 87254 Observed fall: No Year found: 1987 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  12.8 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 22 approved meteorites classified as LL3.5. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||
| Comments: | Field number: 4731 | ||||||||||||||||||||
| Writeup |
Writeup from AMN 12(1):
Sample No.: LEW87254 Location: Lewis Cliff Weight(g): 12.8 Field No.: 4731 Dimensions (cm): 2.2x1.7x1.5 Meteorite Type: LL3 Chondrite
Macroscopic Description: René Martinez Smooth fusion crust covers about 70% of this meteorite and shows radiating flow marks. Light colored chondrules up to ~4 mm are clearly defined in a dark gray matrix.
Thin Section (,2) Description: Brian Mason The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 1.8 mm across, in a minimum amount of black matrix containing trace amounts of nickel-iron and troilite. Chondrule types include granular olivine and olivine-pyroxene, barred olivine, and cryptocrystalline pyroxene. Much of the pyroxene is polysynthetically twinned clinobronzite. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa7-34, mean Fa16 (CV FeO is 49); pyroxene, Fs2-24. The trace amount of nickel-iron suggests LL group, and the variability of olivine and pyroxene compositions type 3; hence the meteorite is classified as an LL3 chondrite (estimated LL3.5). | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 3818: |
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| References: | Published in Antarctic Meteorite Newsletter 12(1) (1989), 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 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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| Revision history: |
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