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Lewis Cliff 86549
Basic information Name: Lewis Cliff 86549
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 86549
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 50.1 g
Antarctic Meteorite Newsletter:  AMN 11(2)  (1988)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.0/3.7
NHM Catalogue:  5th Edition  (2000)  L3.0/3.7
MetBase:  v. 7.1  (2006)  L3.0-3.7
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  L3.0-3.7
Recommended:  L3.0-3.7    [explanation]

This is the only approved meteorite classified as L3.0-3.7.
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 3074
Writeup from AMN 11(2):

Sample No.: LEW86549

Location: Lewis Cliff

Weight (g): 50.1

Field No.: 3074

Dimensions (cm): 3 x 2.5 x 2.5

Meteorite Type: L3 Chondrite


Macroscopic Description: René Martinez

About 50% of the surface of this specimen is covered by black polygonally fractured fusion crust. The interior is gray with up to 2 mm-diameter chondrules.


Thin Section (,3) Description: Brian Mason

The section consists mainly of chondrules and chondrule fragments, with a minor amount of dark finely-granular matrix containing a little nickel-iron and troilite. The chondrules are relatively small, the largest 0.9 mm across; most are granular olivine and olivine-pyroxene, but barred olivine and radiating pyroxene chondrules are also present. Weathering is extensive, with brown limonitic staining throughout the section. Olivine and pyroxene are variable in composition: olivine, Fa5-20, mean Fa15 (CV FeO is 28); pyroxene, Fs1-29. The low content of nickel-iron suggests L group, and the range of olivine and pyroxene compositions type 3, hence this meteorite is tentatively classified as an L3 chondrite (estimated L3.7).

Data from:
  Table 2
  Line 3578:
Origin or pseudonym:Lower Ice Tongue
Mass (g):50.1
Weathering grade:B
Fayalite (mol%):5-20
Ferrosilite (mol%):1-29
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References: Published in Antarctic Meteorite Newsletter 11(2) (1988), 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° 15' 16"S, 161° 24' 32"E)
Note: the NHM and MetBase coordinates are 4.9 km apart

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