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Lewis Cliff 87254
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:help 12.8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 12(1)  (1989)  LL3
Meteoritical Bulletin:  MB 76  (1994)  LL3.5
NHM Catalogue:  5th Edition  (2000)  LL3.5
MetBase:  v. 7.1  (2006)  LL3.5
Recommended:  LL3.5    [explanation]

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
Writeuphelp
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:
Origin or pseudonym:Upper Walcott Névé
Mass (g):12.8
Class:LL3.5
Weathering grade:B
Fayalite (mol%):7-34
Ferrosilite (mol%):2-24
Catalogs:
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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:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 25' 48"S, 161° 21' 29"E)
Note: the NHM and recommended coordinates are 16.7 km apart

Statistics:
     This is 1 of 40753 approved meteorites from Antarctica (plus 4494 unapproved names)
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