MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 29 May 2023
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Lewis Cliff 87220
Basic information Name: Lewis Cliff 87220
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 87220
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 6.7 g
Antarctic Meteorite Newsletter:  AMN 15(2)  (1992)  E3
AMN 17(1)  (1994)  E3-an
Meteoritical Bulletin:  MB 76  (1994)  E3-an
NHM Catalogue:  5th Edition  (2000)  E3-an
MetBase:  v. 7.1  (2006)  E3-an
Recommended:  E3-an    [explanation]

This is 1 of 6 approved meteorites classified as E3-an.   [show all]
Search for other: Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites
Comments: Field number: 4733
Writeup from AMN 15(2):

Sample No.: LEW87220; 87234

Location: Lewis Cliff

Field Number: 4733; 4786

Dimensions (cm): 2.5x2x4.4; 5x2.5x2

Weight (g): 6.7; 34.2

Meteorite Type: E3 Chondrite


Macroscopic Description: Carol Schwarz There is no fusion crust remaining on either of these extremely weathered specimens. Both are extensively fractured and friable with no features visible on the interior. 87234 has some evaporates.


Thin Section (LEW87220,2; 87234,2) Description: Brian Mason

These two meteorites are identical and cans be confidently paired with LEW87057, 87223, 87237, and 87285. The sections show a closely packed aggregate of chondrules, up to 1.2 mm across, together with abundant metal grains and minor sulfide. The meteorites are severely weathered, with limonite staining and areas of brown limonite throughout the sections. The chondrules consist of radiating or granular pyroxene. Most of the pyroxene is close to MgSiO3 in composition, but a few more Fe-rich grains were analyzed. One grain of forsteritic olivine was analyzed in LEW87234. The metal contains 0.4-0.6% Si. The meteorites are classified as E3 chondrites.


Data from:
  Table 2
  Line 3787:
Origin or pseudonym:South Lewis Cliff
Mass (g):6.7
Class:E3 an
Weathering grade:C
Fayalite (mol%):¾
Ferrosilite (mol%):0.2-12
Comments:87057 pairing group
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 15(2) (1992), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
Find references in NASA ADS:
Find references in Google Scholar:

     Catalogue of Meteorites:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 20' 32"S, 161° 15' 5"E)
Note: the NHM and MetBase coordinates are 6.8 km apart

     This is 1 of 43856 approved meteorites from Antarctica (plus 3802 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page