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Lewis Cliff 86210
Basic information Name: Lewis Cliff 86210
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 86210
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 9.2 g
Antarctic Meteorite Newsletter:  AMN 11(1)  (1988)  Mesosiderite
Meteoritical Bulletin:  MB 76  (1994)  Mesosiderite
NHM Catalogue:  5th Edition  (2000)  Mesosiderite
MetBase:  v. 7.1  (2006)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 256 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Field number: 2306
Writeup from AMN 11(1):

Sample No.: LEW86210

Location: Lewis Cliff

Weight (g): 9.2

Field No.: 2306

Dimensions (cm): 1.5x1.5x1.5

Meteorite Type: Mesosiderite


Macroscopic Description: Cecilia Satterwhite,

This pebble is weathered reddish-brown. Interior has very high metallic fraction; 1-2 mm-size tan-colored inclusions are abundant.


Thin Section (,2) Description: Brian Mason

The section consists of a granular aggregate of about 50% nickel-iron, 50% silicates. The silicates are dominantly pyroxene with lesser amounts of plagioclase, as clastic grains up to 1.5 mm in maximum dimension in a matrix of comminuted silicates. Minor weathering is indicated by small areas of brown limonite. Microprobe analyses show pyroxene compositions with a range of Wo2-8Fs24-61; most grains are in the range Fs24-31, with a mean of Wo4Fs29. Plagioclase composition is An89-92. One grain of olivine, Fa45, was analysed. The meteorite is a mesosiderite.

Data from:
  Table 2
  Line 3251:
Origin or pseudonym:Lower Ice Tongue
Mass (g):9.2
Weathering grade:C
Fayalite (mol%):45
Ferrosilite (mol%):24-61
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References: Published in Antarctic Meteorite Newsletter 11(1) (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' 21"S, 161° 22' 20"E)
Note: the NHM and MetBase coordinates are 4.4 km apart

     This is 1 of 43857 approved meteorites from Antarctica (plus 3802 unapproved names)
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