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Lewis Cliff 86495
Basic information Name: Lewis Cliff 86495
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 86495
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 2.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(1)  (1991)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.5
NHM Catalogue:  5th Edition  (2000)  L3.5
MetBase:  v. 7.1  (2006)  L3.5
Recommended:  L3.5    [explanation]

This is 1 of 95 approved meteorites classified as L3.5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 4896
Writeuphelp
Writeup from AMN 14(1):

Sample No: LEW86495

Location: Lewis Cliff

Field Number: 4896

Dimensions (cm): 1.2 x 1.4 x 0.5

Weight (g): 2.5

Meteorite Type: L3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

Although this small meteorite is completely- covered with fusion crust, the interior is very weathered, having an orangish-brown color. Some inclusions are still visible.

 

Thin Section (,2) Description: Brian Mason

The section shows numerous chondrules and chondrule fragments, up to 1.1 mm across, in a granular matrix consisting largely of olivine and pyroxene with small amounts of nickel-iron and troilite. The meteorite is considerably weathered, with brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-22, mean Fa14 (CV FeO is 49); pyroxene, Fs3-17. The small amount of nickel-iron suggests L group, and the variability of olivine and pyroxene compositions type 3, hence the meteorite is classified as an L3 chondrite (estimated L3.5).

 

Data from:
  MB76
  Table 2
  Line 3528:
Origin or pseudonym:Upper Ice Tongue
Mass (g):2.5
Class:L3.5
Weathering grade:B/C
Fayalite (mol%):1-22
Ferrosilite (mol%):3-17
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 14(1) (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° 16' 2"S, 161° 25' 27"E)
Note: the NHM and MetBase coordinates are 4.2 km apart

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