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Lewis Cliff 88180
Basic information Name: Lewis Cliff 88180
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88180
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 46.5 g
Antarctic Meteorite Newsletter:  AMN 13(3)  (1990)  E6
AMN 17(1)  (1994)  EH6
Meteoritical Bulletin:  MB 76  (1994)  EH6
NHM Catalogue:  5th Edition  (2000)  EH5
MetBase:  v. 7.1  (2006)  EH5
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  EH5
Recommended:  EH5    [explanation]

This is 1 of 9 approved meteorites classified as EH5.   [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Field number: 5171
Writeup from AMN 13(3):

Sample No. LEW88180

Location: Lewis Cliff

Dimensions (cm): 3.8 x 2 x 1

Field Number: 5171

Weight (g): 46.5

Meteorite Type: E6 chondrite


Macroscopic Description: Cecilia Satterwhite

This smooth and rounded meteorite is covered with brown weathered fusion crust. A large deposit of evaporite minerals covers some of the fusion crust. The interior is composed of fine-grained blue-black matrix. Oxidation is moderate but evaporite deposit is abundant in the interior.


Thin Section (,2) Description: Brian Mason

Chondrules and chondrule fragments are barely recognizable, the section consisting largely of enstatite in prisms up to 0.3 mm long; the section also shows a considerable amount (~25%) of nickel-iron and minor amounts of sulfides and plagioclase. The meteorite appears to be unweathered. Microprobe analyses show that most of the enstatite is almost pure MgSiO3, with FeO less than 0.3%, but rare grains with FeO up to 9.2% were measured. One grain of plagioclase was analysed; it is almost pure albite, with CaO 0.5%, K2O 1.1%. The nickel-iron contains 2.4% Si. Rare grains of a silica polymorph, tridymite or cristobalite, were detected. The meteorite is an enstatite chondrite, classified E6.

Data from:
  Table 2
  Line 4036:
Origin or pseudonym:Lower Ice Tongue
Mass (g):46.5
Weathering grade:B/Ce
Ferrosilite (mol%):0-13
Plots: O isotopes:  
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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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     Catalogue of Meteorites:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 14' 19"S, 161° 27' 22"E)
Note: the NHM and MetBase coordinates are 6.5 km apart

     This is 1 of 44547 approved meteorites from Antarctica (plus 3802 unapproved names)
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