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Lewis Cliff 86018 | |||||||||||||||||||||
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Basic information | Name: Lewis Cliff 86018 This is an OFFICIAL meteorite name. Abbreviation: LEW 86018 Observed fall: No Year found: 1986 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 502 g | ||||||||||||||||||||
Classification history: |
This is 1 of 17 approved meteorites classified as L3.1. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||
Comments: | Field number: 4004 | ||||||||||||||||||||
Writeup |
Writeup from AMN 10(2):
Sample No.: LEW86018 Location: Lewis Cliff Weight (g): 502.0 Field No.: 4004 Dimensions (cm): 10 x 6 x 6 Meteorite Type: L3 Chondrite
Macroscopic Description: Roberta Score Dull black fusion crust covers 60% of this unequilibrated chondrite. Areas devoid of fusion crust are reddish-brown. The clastic nature of the stone is apparent even though the interior is fairly weathered. Matrix is brown in color and contains numerous inclusions. The largest inclusion is 5 mm long. A minute amount of evaporite deposit exists immediately under the fusion crust.
Thin Section (,6) Description: Brian Mason The section shows a close-packed mass of chondrules, chondrule fragments, and irregular granular aggregates in a small amount of dark fine-grained matrix. Chondrules range up to 3.2 mm across, and show a diversity of type, the commonest being granular and porphyritic olivine and olivine-pyroxene. Brown limonitic staining pervades the section. Microprobe analyses show olivine and pyroxene with variable compositions: olivine, Fa0.7-32 , with a mean of Fa15 (CV FeO is 44) ; pyroxene, Fs2-9. The meteorite is an L3 chondrite (estimated L3.5). | ||||||||||||||||||||
Data from: MB76 Table 2 Line 3061: |
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Catalogs: |
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References: | Published in Antarctic Meteorite Newsletter 10(2) (1987), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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Revision history: |
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