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Lewis Cliff 88315
Basic information Name: Lewis Cliff 88315
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88315
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 25.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  H3
Meteoritical Bulletin:  MB 76  (1994)  H3.5
NHM Catalogue:  5th Edition  (2000)  H3.5
MetBase:  v. 7.1  (2006)  H3.5
Recommended:  H3.5    [explanation]

This is 1 of 20 approved meteorites classified as H3.5.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 6175
Writeuphelp
Writeup from AMN 14(2):

Sample No.: LEW88315

Location: Lewis Cliff

Field Number: 6175

Dimensions (cm): 2.7 x 2.5 x 2.2

Weight (g): 25.1

Meteorite Type: H3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

Oxidation haloes are present in the omnipresent black/brown fusion crust. One large fracture penetrates the interior of this weathered meteorite. Inclusions and metal are visible in the dark brown matrix. Evaporite deposit is present.

 

Thin Section (,2) Description: Brian Mason.

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 1.6 mm across, in a matrix of fine-grain olivine and pyroxene with a moderate amount of nickel-iron and troilite. Considerable weathering is indicated by limonitic staining and patches of brown limonite throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-22, mean Fa15 (CV FeO is 41); pyroxene, Fs2-39. The amount of nickel-iron suggests H group, and the variability of olivine and pyroxene compositions type 3, hence the meteorite is classified as an H3 chondrite (estimated H3.5).

 

Data from:
  MB76
  Table 2
  Line 4169:
Origin or pseudonym:Upper Ice Tongue
Mass (g):25.1
Class:H3.5
Weathering grade:Ce
Fayalite (mol%):1-22
Ferrosilite (mol%):2-39
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 14(2) (1991), 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° 17' 43"S, 161° 19' 17"E)
Note: the NHM and MetBase coordinates are 3 km apart

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