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Lewis Cliff 85420
Basic information Name: Lewis Cliff 85420
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 85420
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.4 g
Antarctic Meteorite Newsletter:  AMN 10(2)  (1987)  L6 breccia
Meteoritical Bulletin:  MB 76  (1994)  L6-br
NHM Catalogue:  5th Edition  (2000)  L6
MetBase:  v. 7.1  (2006)  L3-6
Recommended:  L3-6    [explanation]

This is 1 of 61 approved meteorites classified as L3-6.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 3148
Writeup from AMN 10(2):

Sample No.: LEW85420

Location: Lewis Cliff

Weight (g): 12.4

Field No.: 3148

Dimensions (cm): 2.5 x 2 x 1.5

Meteorite Type: Brecciated L6 Chondrite


Macroscopic Description: René Martinez

Smooth fusion crust covers all but one fracture surface. The interior is dark gray with few light colored inclusions present.


Thin Section (,3) Description: Brian Mason

A few chondrule fragments are present, but most of the section consists of a finely granular aggregate of olivine and pyroxene; some of the pyroxene is polysynthetically twinned clinobronzite. Some fragments of barred olivine chondrules have transparent brown glass bars. Minor amounts of nickel-iron and troilite are present. Olivine and pyroxene are essentially uniform in composition: olivine. Fa24; pyroxene, Fs20. A little plagioclase, An10, was analysed. The meteorite is tentatively classified as an intensely brecciated L6 chondrite, containing fragments of L3-5 chondrites.

Data from:
  Table 2
  Line 2992:
Origin or pseudonym:Upper Ice Tongue
Mass (g):12.4
Weathering grade:B/Ce
Fayalite (mol%):25
Ferrosilite (mol%):20
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References: Published in Antarctic Meteorite Newsletter 10(2) (1987), 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° 16' 36"S, 161° 24' 22"E)
Note: the NHM and MetBase coordinates are 3.7 km apart

     This is 1 of 43699 approved meteorites from Antarctica (plus 3802 unapproved names)
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