Meteoritical Bulletin: Entry for Lewis Cliff 93891

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Lewis Cliff 93891

Basic information

Name: Lewis Cliff 93891
This is an OFFICIAL meteorite name.
Abbreviation: LEW 93891
Observed fall: No
Year found: 1993
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 25.5 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 18(1)	(1995)	L3.7
Meteoritical Bulletin:	MB 79	(1996)	L3.7
NHM Catalogue:	5th Edition	(2000)	L3.7
MetBase:	v. 7.1	(2006)	L3.7
Recommended:			L3.7 [explanation]

This is 1 of 51 approved meteorites classified as L3.7. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Field number: 8574

Writeup

Writeup from AMN 18(1):

Sample No.: LEW93891
Location: Lewis Cliff
Dimensions (cm): 2.8 x 2.6 x 1.5
Weight (g): 25.5
Meteorite Type: L3 Chondrite (estimated L3.7)

Macroscopic Description: Cecilia Satterwhite
Ninety percent of the exterior of this unequilibrated ordinary chondrite is covered with pitted, brownish-black fusion crust. The interior is dark gray to brown. Metal occurrence is low. There are abundant chondrules visible and most are heavily weathered.

Thin Section (,2) Description: Brian Mason
The section shows numerous chondrules (up to 2.2 mm across), chondrule fragments, and mineral grains in a dark brown to black matrix which contains minor amounts of nickel-iron and troilite. Brown limonitic staining pervades the section. Microprobe analyses show a wide range of olivine and pyroxene compositions: olivine, Fa6-20, mean Fa15; pyroxene, Fs4-23. The meteorite is an L3 chondrite (estimated L3.7).

Data from:
  MB79
  Table 2
  Line 480:

Origin or pseudonym:	Upper Ice Tongue
Mass (g):	25.5
Class:	L3.7
Weathering grade:	B/C
Fayalite (mol%):	6-20
Ferrosilite (mol%):	4-23

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):

References:

Published in Antarctic Meteorite Newsletter 18(1) (1995), JSC, Houston
Published in Meteoritical Bulletin, no. 79, MAPS 31, A161-A174 (1996)

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Geography:

Antarctica

Coordinates:
Catalogue of Meteorites:	(84° 17'S, 161° 5'E)
Recommended::	(84° 16' 17"S, 161° 26' 56"E)

Note: the NHM and MetBase coordinates are 2.8 km apart
Note: the NHM and recommended coordinates are 4.3 km apart
Note: the MetBase and recommended coordinates are 2.1 km apart

Statistics:
This is 1 of 40744 approved meteorites from Antarctica (plus 4494 unapproved names)

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