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Meteorite Hills 00422
Basic information Name: Meteorite Hills 00422
     This is an OFFICIAL meteorite name.
Abbreviation: MET 00422
Observed fall: No
Year found: 2000
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 202 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Diogenite
Antarctic Meteorite Newsletter:  AMN 24(2)  (2001)  Diogenite
Meteoritical Bulletin:  MB 86  (2002)  Diogenite
MetBase:  v. 7.1  (2006)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 440 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Writeuphelp
Writeup from AMN 24(2):
Sample No.: MET 00422
Location: Meteorite Hills
Field No.: 13466
Dimensions (cm):   7.0x4.0x4.0
Weight (g): 201.466
Meteorite Type: Diogenite
    MET00422

Macroscopic Description: Kathleen McBride
40% of the exterior of this meteorite is covered with a chocolate brown fusion crust. This crust is patchy and displays polygonal fractures. The exposed interior is gray and tan and has dark colored, crystalline clasts. The interior is mostly gray matrix with some areas of tan colored grains. This rock contains numerous euhedral clasts of various colors - black, green, white, yellow, and is moderately soft.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
MET 00422 - Cross-Polarized Light The section shows a groundmass of highly comminuted pyroxene, with the largest grain reaching 1.8 mm. Orthopyroxene has a composition of Fs22Wo1-2. The Fe/Mn ratio of the pyroxene is ~30. The meteorite is a diogenite.

Data from:
  MB86
  Table A1
  Line 26:
Mass (g):201.5
Class:Diog
Weathering grade:A/B
Ferrosilite (mol%):22
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 24(2) (2001), JSC, Houston
Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
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Photos:
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Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (79° 41'S, 155° 45'E)
     Recommended::   (79° 41'S, 155° 45'E)

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