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Lewis Cliff 88175
Basic information Name: Lewis Cliff 88175
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88175
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 111.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 13(3)  (1990)  LL3
Meteoritical Bulletin:  MB 76  (1994)  LL3.8
NHM Catalogue:  5th Edition  (2000)  LL3.8
MetBase:  v. 7.1  (2006)  L3.4
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  L3.4
Recommended:  L3.4    [explanation]

This is 1 of 51 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 5170
Writeuphelp
Writeup from AMN 13(3):

Sample No. LEW88175

Location: Lewis Cliff

Dimensions (cm): 5 x 4 x 2.5

Field Number: 5170

Weight (g): 111.3

Meteorite Type: LL3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

The exterior has a small amount of dull black pitted fusion crust. Areas devoid of fusion crust are rough in texture, brown in color, and show the clastic nature of the meteorite. Oxidation is heavy in areas obscuring the interior features present. Some evaporite deposits are visible on both interior and exterior surfaces.

 

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 matrix of fine-grained olivine and pyroxene with a little nickel-iron and troilite. Weathering is extensive, with brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa5-31, mean Fa22 (CV FeO is 19); pyroxene, Fs2-25- The small 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 LL3.8).

 

Data from:
  MB76
  Table 2
  Line 4031:
Origin or pseudonym:Lower Ice Tongue
Mass (g):111.3
Class:LL3.8
Weathering grade:B/Ce
Fayalite (mol%):5-31
Ferrosilite (mol%):2-25
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 13(3) (1990), 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° 14' 17"S, 161° 26' 19"E)
Note: the NHM and MetBase coordinates are 6.4 km apart

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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