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Meteorite Hills 00427
Basic information Name: Meteorite Hills 00427
     This is an OFFICIAL meteorite name.
Abbreviation: MET 00427
Observed fall: No
Year found: 2000
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 18.6 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Howardite
Antarctic Meteorite Newsletter:  AMN 24(2)  (2001)  Howardite
Meteoritical Bulletin:  MB 86  (2002)  Howardite
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 382 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from AMN 24(2):
Sample No.: MET 00427
Location: Meteorite Hills
Field No.: 13749
Dimensions (cm):   3.5x2.5x2.0
Weight (g): 18.558
Meteorite Type: Howardite
    MET00427
 
Macroscopic Description: Kathleen McBride
Chocolate brown fusion crust covers 90% of this meteorite. The crust has a slight sheen to it and has polygonal fractures. The interior consists of a gray matrix with small inclusions of various colors. This meteorite is soft and moderately friable.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach

MET 00427 - Plane-Polarized Light MET 00427 - Cross-Polarized Light
Plane-Polarized Light Cross-Polarized Light
The section shows a groundmass of comminuted pyroxene and plagioclase (up to 1 mm) with large (6 mm) coarse-grained diogenite fragments and a single mm-sized impact melt spherule. Pyroxene includes orthopyroxene (Fs40Wo1-2) and exsolved pyroxenes of Fs37Wo4 to Fs15Wo38. The Fe/Mn ratio is ~30. Plagioclase is An76-93Or0-1. The meteorite is a howardite.

Data from:
  MB86
  Table A1
  Line 31:
Mass (g):18.6
Class:How
Weathering grade:B
Ferrosilite (mol%):14-41
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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