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Northwest Africa 10956
Basic information Name: Northwest Africa 10956
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10956
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 136.4 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H4
Recommended:  H4    [explanation]

This is 1 of 6493 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Nov 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10956 (NWA 10956)

(Northwest Africa)

Purchased: 2013 Jul

Classification: Ordinary chondrite (H4)

History: Purchased by John Shea in July 2013 from Steve Witt, who obtained the stone from a Moroccan dealer in 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed chondrules (apparent diameter 450±300 μm, several larger than 2 mm) occur within a recrystallized matrix containing abundant altered metal. Several chondrules containing silica polymorph and orthopyroxene were observed.

Geochemistry: Olivine (Fa17.8-18.0, N = 3), orthopyroxene (Fs15.4-16.3Wo0.7-1.0, N = 3), clinopyroxene (Fs7.8Wo44.3, Fs8.3Wo36.3, N = 2).

Classification: Ordinary chondrite (H4).

Specimens: 31.2 g including one polished thin section at UWB; remainder with Mr. J. Shea.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Lake Station, Indiana
Date:P 2013 Jul
Mass (g):136.4
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.8-18.0
Ferrosilite (mol%):15.4-16.3
Wollastonite (mol%):0.7-1.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):31.2
Type spec location:UWB
Main mass:J. Shea
Comments:Shea 16-5; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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