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MacAlpine Hills 041269
Basic information Name: MacAlpine Hills 041269
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 041269
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 4.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 29(1)  (2006)  Howardite
Meteoritical Bulletin:  MB 91  (2007)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 384 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Field number: 15820
Approved 21 Feb 2006
Writeuphelp
Writeup from AMN 29(1):
Sample No.: MAC 041269
Location: MacAlpine Hills
Field No.: 15820
Dimensions (cm):   2.0x1.5x1.0
Weight (g): 4.509
Meteorite Type: Howardite


Macroscopic Description: Kathleen McBride
50% of the exterior surface is covered with black shiny (like glass) fusion crust. The interior is a black and gray, fine grained matrix with black and white inclusions. Very minor amount of rust is present.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
Cross-Polarized LightPlane-Polarized Light
MAC 041269 - Cross-Polarized Light MAC 041269 - Plane-Polarized Light
The section shows a groundmass of comminuted pyroxene and plagioclase (up to 0.5 mm) with fine- to coarse-grained basaltic clasts ranging up to 5 mm. Pyroxene ranges from pigeonite composition (possibly finely exsolved) of Fs56Wo6 to augite of Fs28Wo40. Plagioclase is An89Or0.5. The meteorite is a howardite.
Data from:
  MB91
  Table 4
  Line 822:
Mass (g):4.5
Class:How
Weathering grade:B
Fayalite (mol%):56
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 29(1) (2006), JSC, Houston
Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Photos:
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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:
unknown      
Geography:

Antarctica
Coordinates:
     Recommended::   (84° 18' 54"S, 159° 53' 20"E)

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