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Meteorite Hills 00423
Basic information Name: Meteorite Hills 00423
     This is an OFFICIAL meteorite name.
Abbreviation: MET 00423
Observed fall: No
Year found: 2000
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 79.4 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 384 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from AMN 24(2):
Sample No.: MET 00423
Location: Meteorite Hills
Field No.: 13556
Dimensions (cm):   6.0x4.0x3.5
Weight (g): 79.375
Meteorite Type: Howardite
    MET00423

Macroscopic Description: Kathleen McBride
~40% of the exterior surface is covered by dark brown fusion crust that has shiny, black patches. The surface contains "vugs" or areas where material has been plucked or weathered out. The fine-grained medium gray matrix has numerous euhedral clasts in various colors - gray, black, tan and white.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
MET 00423 - Cross-Polarized Light The section shows a groundmass of comminuted pyroxene and plagioclase (up to 1 mm) with medium- to coarse-grained basaltic clasts ranging up to 3 mm. Pyroxene includes orthopyroxene (Fs20-53Wo1-3) and exsolved pyroxenes of Fs49Wo5 to Fs22Wo38. The Fe/Mn ratio is ~30. Plagioclase is An78-93Or0-1. The meteorite is a howardite.

Data from:
  MB86
  Table A1
  Line 27:
Mass (g):79.4
Class:How
Weathering grade:A/B
Ferrosilite (mol%):20-53
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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