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Grosvenor Mountains 95574
Basic information Name: Grosvenor Mountains 95574
     This is an OFFICIAL meteorite name.
Abbreviation: GRO 95574
Observed fall: No
Year found: 1995
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 90.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 21(1)  (1998)  Howardite
Meteoritical Bulletin:  MB 82  (1998)  Howardite
NHM Catalogue:  5th Edition  (2000)  Howardite
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 379 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from AMN 21(1):

Sample No

.:

GRO95574

Location:

Grosvenor Mountains

Dimensions (cm):

5.5x3.5x 3.0

Weight (g):

90.62

Meteorite Type:

Howardite

GRO95574 Thumbnail

Macroscopic Description: Kathleen McBride
Ninety five percent of the exterior of this achondrite has smooth, black fusion crust, that appears shiny in some small patches. The interior is gray in color and resembles concrete. Almost no rust is present. There are light colored clasts approximately 1-2 mm in size and a few dark clasts < 1 mm in size.

Thin Section (,2) Description: Brian Mason
GRO95574 - Cross-Polarized Light The section shows a groundmass of comminuted pyroxene and plagioclase grains (up to 0.3 mm) with a few larger plagioclase clasts (up to 1 mm). Microprobe analyses show that most of the pyroxene is hypersthene (Wo1-5, Fs22-34); one grain of augite, Wo36Fs37, was analyzed, and several grains of intermediate composition. Plagioclase composition is An91-96. The meteorite is a howardite, very similar in texture and mineral compositions to GRO95534, 95535, 95581, and 95602, with which it is probably paired.

Data from:
  MB82
  Table A1
  Line 208:
Origin or pseudonym:Inner Cecily
Mass (g):90.6
Class:How
Weathering grade:A
Ferrosilite (mol%):22-37
Comments:95534 pairing group
Catalogs:
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Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 21(1) (1998), JSC, Houston
Published in Meteoritical Bulletin, no. 82, MAPS 33, A221-A240 (1998)
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Photos:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
courtesy Dr Carlton Allen, JSC-KT, NASA      
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (85° 40'S, 175° 0'E)
     Recommended::   (85° 40'S, 175° 0'E)

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