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| Lewis Cliff 85440 | |||||||||||||||||||||||||
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| Basic information | Name: Lewis Cliff 85440 This is an OFFICIAL meteorite name. Abbreviation: LEW 85440 Observed fall: No Year found: 1985 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  43.8 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 627 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||
| Comments: | Field number: 2023 | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 10(1):
Sample No.: LEW85440 Location: Lewis Cliff Weight (g): 43.8 Field No.: 2023 Dimensions (cm): 4.5x2.5x2 Meteorite Type: Ureilite
Macroscopic Description,: Roberta Score Thin black fusion crust covers sixty percent of LEW85440. Greenish-gray streaks appear on all fusion crusted surfaces. Abundant minerals all showing crystal faces and areas of heavy oxidation make up the black interior.
Thin Section (,4) Description: Brian Mason The section shows an equigranular aggregate of olivine and pyroxene, as rounded to subhedral grains 0.3-0.6 mm across. The grains are rimmed with black carbonaceous material, which contains trace amounts of nickel-iron (partly weathered to brown limonite) and troilite. Microprobe analyses show olivine and pyroxene of uniform composition: olivine, Fa9 (CaO 0.3%); pyroxene Wo5Fs8. The meteorite is a ureilite; it appears to be relatively unshocked. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 3011: |
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| References: | Published in Antarctic Meteorite Newsletter 10(1) (1987), 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 43856 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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