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Lewis Cliff 85311
Basic information Name: Lewis Cliff 85311
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 85311
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 199.5 g
Antarctic Meteorite Newsletter:  AMN 9(3)  (1986)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CM2
AMN 41(1)  (2018)  CM2-an
Recommended:  CM2-an    [explanation]

This is 1 of 10 approved meteorites classified as CM2-an.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Field number: 3103
Revised 3 Jun 2019: reclassified in AMN 41(1)
Writeup from AMN 9(3):
See LEW 85306

Database editor's note:  Two oxygen isotope analyses of this meteorite appear in the paper by R. N.Clayton and T. K.Mayeda (GCA, 1999, v.63, p.2089).  The analysis in Table 4 of that paper (δ18O= -1.23, δ17O= -3.87, Δ17O= -3.23) is actually that of an olivine separate.  The analysis in Table 5 is the correct bulk value (δ18O= +1.21, δ17O= -2.98, Δ17O= -3.61).  R. N. Clayton, private communication to J. Grossman (Feb. 22, 2008).

Writeup from AMN 41(1):
LEW 85311: reclassification

Listed by Choe et al. (2010) as CM2-anomalous
  • Choe W. H., Huber H., Rubin A.E., Kallemeyn G. W., and Wasson J. T. (2010) Compositions and taxonomy of 15 unusual carbonaceous chondrites. Meteorit. Planet. Sci. 45, 531-554 (link)
Data from:
  Table 2
  Line 2884:
Origin or pseudonym:Upper Ice Tongue
Mass (g):199.5
Weathering grade:Be
Fayalite (mol%):0.4-36
Ferrosilite (mol%):0.9-1.1
Comments:NTL=<1; 85306 pairing group
Plots: O isotopes:  
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References: Published in Antarctic Meteorite Newsletter 41(1) (2018), JSC, Houston
Published in Antarctic Meteorite Newsletter 9(3) (1986), 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° 16' 11"S, 161° 27' 36"E)
Note: the NHM and MetBase coordinates are 4.5 km apart

     This is 1 of 43856 approved meteorites from Antarctica (plus 3802 unapproved names)
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