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Lewis Cliff 88516
Basic information Name: Lewis Cliff 88516
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 88516
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 13.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 14(2)  (1991)  Shergottite
Meteoritical Bulletin:  MB 76  (1994)  Shergottite
NHM Catalogue:  5th Edition  (2000)  Martian (shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-lherzolitic
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 159 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Writeuphelp
Writeup from AMN 14(2):

Sample No.: LEW88516

Location: Lewis Cliff

Field Number: 5348

Dimensions (cm): 2 x 2 x 1.5

Weight (g): 13.2

Meteorite Type: Shergottite

 

Macroscopic Description: Cecilia Satterwhite

Pitted and mostly shiny fusion crust covers 80% of LEW88516. The sample's interior consists of green/black matrix which appears glassy and has conchoidal fractures. Several dark colored inclusions are present.

 

Thin Section (,3) Description: Brian Mason

The section shows that this meteorite is an achondrite with the approximate composition (volume percent): olivine 50, pyroxene 35, maskelynite 8, opaques (mostly chromite, with a little troilite) 2, brown glass 5. Olivine is present as rounded anhedral to subhedral grains, up to 1.8 mm long, and weakly pleochroic in pale brown. Pyroxene occurs as colorless subhedral grains up to 3 mm long, showing undulose extinction, and maskelynite is interstitial to the olivine and pyroxene. Dark brown glass containing numerous birefringent needly-like crystals (probably olivine) occurs as veinlets and patches up to 1.5 mm across. A little fusion crust is present on one edge. Microprobe analyses gave the following compositions: olivine, Fa33; pyroxene, Wo5Fs28; maskelynite, An53. The meteorite is a shergottite; it resembles ALHA 77005 in texture and mineral compositions.

 

Data from:
  MB76
  Table 2
  Line 4362:
Origin or pseudonym:Lower Ice Tongue
Mass (g):13.2
Class:Sherg
Weathering grade:A/B
Fayalite (mol%):33
Ferrosilite (mol%):28
Catalogs:
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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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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Dr Carlton Allen, JSC-KT, NASA      
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 14' 36"S, 161° 30' 6"E)
Note: the NHM and MetBase coordinates are 6.5 km apart

Statistics:
     This is 1 of 36654 approved meteorites from Antarctica (plus 5519 unapproved names)
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