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Grosvenor Mountains 95577
Basic information Name: Grosvenor Mountains 95577
     This is an OFFICIAL meteorite name.
Abbreviation: GRO 95577
Observed fall: No
Year found: 1995
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 106.2 g
Antarctic Meteorite Newsletter:  AMN 20(1)  (1997)  C2
Meteoritical Bulletin:  MB 82  (1998)  C2
NHM Catalogue:  5th Edition  (2000)  C2
MetBase:  v. 7.1  (2006)  CR1
Antarctic Meteorite Newsletter:  AMN 30(2)  (2007)  CR1
Recommended:  CR1    [explanation]

This is the only approved meteorite classified as CR1.
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 1), and CR chondrites
Writeup from AMN 20(1):
Sample No.:GRO95577
Location:Grosvenor Mountains
Dimensions (cm):6.4 x 3.6 x 3.3 cm
Weight (g):106.2 g
Meteorite Type:C2 Chondrite

Macroscopic Description: Cecilia E. Satterwhite
The exterior of this carbonaceous chondrite is covered with black fusion crust and is frothy in some areas. Flow lines are present on some surfaces. Areas devoid of fusion crust are brown, pitted and weathered. Fractures are numerous and penetrate the surface. The interior of the sample reveals a grayish-black matrix, weathered brown in areas. Minor white evaporite deposits are visible and small inclusions/chondrules are present but weathered.

Thin Section (,3) Description: Brian Mason
The section shows numerous chondrules (up to 1.8 mm across), irregular aggregates, and small mineral grains in a dark brown to black matrix; accessory nickel-iron and troilite are present, mainly rimming chondrules. The chondrules, aggregates, and mineral grains consist almost entirely of an isotropic to weakly birefringent serpentine; a little calcite is present. The meteorite is a C2 chondrite.

Data from:
  Table A1
  Line 211:
Origin or pseudonym:Outer Cecily
Mass (g):106.2
Weathering grade:B
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References: Published in Antarctic Meteorite Newsletter 20(1) (1997), JSC, Houston
Published in Meteoritical Bulletin, no. 82, MAPS 33, A221-A240 (1998)
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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   

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

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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