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Lewis Cliff 88254
Basic information Name: Lewis Cliff 88254
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88254
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 13.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 13(3)  (1990)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.4
NHM Catalogue:  5th Edition  (2000)  L3.4
MetBase:  v. 7.1  (2006)  L3.4
Recommended:  L3.4    [explanation]

This is 1 of 51 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 6045
Writeuphelp
Writeup from AMN 13(3):

Sample No. LEW88254; 88261; 88263

Location: Lewis Cliff

Dimensions (cm): 3 x 2 x 1.7;1.7 x 1.5x 1; 2.4x2x 1.3

Field Number: 6045;6090; 6080

Weight (g): 13.5; 17.6; 8.8

Meteorite Type: L3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

Black fusion crust covers most of these 3 specimens. LEW88263 has one fracture surface. The interior matrix of all three specimens is dark gray to black with abundant 1-3 mm sized chondrules/inclusions. Weathering is moderate.

 

Thin Section (LEW88254,2; 88261,2; 88263,2) Description: Brian Mason

These meteorites are so similar that a single description will suffice; the possibility of pairing should be considered. They are highly chondritic, with chondrules ranging up to 2.9 mm across. The chondrules are rimmed with dark matrix, which contains a small amount of nickel-iron and troilite. Most of the chondrules are granular or porphyritic olivine and olivine-pyroxene, but radiating and cryptocrystalline pyroxene chondrules were noted; transparent brown glass was seen in one chondrule. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-41, mean Fa16 (CV FeO is 54); pyroxene, Fs1-23. The small amount of nickel-iron suggests L group, and the variability of olivine and pyroxene compositions type 3, hence these meteorites are classified as L3 chondrites (estimated L3.4).

 

Data from:
  MB76
  Table 2
  Line 4108:
Origin or pseudonym:Lower Ice Tongue
Mass (g):13.5
Class:L3.4
Weathering grade:B/C
Fayalite (mol%):1-30
Ferrosilite (mol%):1-22
Comments:88254 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 13(3) (1990), 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° 14' 7"S, 161° 27' 55"E)
Note: the NHM and MetBase coordinates are 6.8 km apart

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