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Lewis Cliff 88393
Basic information Name: Lewis Cliff 88393
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88393
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.2 g
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  H3
Meteoritical Bulletin:  MB 76  (1994)  H3.7
NHM Catalogue:  5th Edition  (2000)  H3.7
MetBase:  v. 7.1  (2006)  H3.7
Recommended:  H3.7    [explanation]

This is 1 of 75 approved meteorites classified as H3.7.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 5196
Writeup from AMN 14(2):

Sample No.: LEW88393

Location: Lewis Cliff

Field Number: 5196

Dimensions (cm): 2.5 x 2.3 x 1.6

Weight (g): 12.2

Meteorite Type: H3 chondrite


Macroscopic Description: Robbie Marlow

The dark brown fusion crust which covers 95% of LEW88393 contains numerous regmaglypts. Abundant inclusions/chondrules with a range in size are visible in the heavily oxidized matrix.


Thin Section (.21 Description: Brian Mason

The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 2.9 mm across, in a small amount of finely granular matrix which contains a moderate amount of nickel-iron and troilite. Minor weathering is indicated by limonitic staining concentrated around metal grains. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa8-22, mean Fa17 (CV FeO is 20); pyroxene, Fs2-23. The amount of nickel-iron suggests H group, and the variability of olivine and pyroxene compositions type 3, hence the meteorite is classified as an H3 chondrite (estimated H3.7).


Data from:
  Table 2
  Line 4243:
Origin or pseudonym:Lower Ice Tongue
Mass (g):12.2
Weathering grade:C
Fayalite (mol%):8-22
Ferrosilite (mol%):2-23
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References: Published in Antarctic Meteorite Newsletter 14(2) (1991), 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° 14' 30"S, 161° 26' 11"E)
Note: the NHM and MetBase coordinates are 6.1 km apart

     This is 1 of 40773 approved meteorites from Antarctica (plus 4570 unapproved names)
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