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Northwest Africa 453
Basic information Name: Northwest Africa 453
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 453
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 539 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  H4
Recommended:  H4    [explanation]

This is 1 of 6339 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 20 Oct 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 453 (NWA 453)

(Northwest Africa)

Purchased: 2003

Classification: Ordinary chondrite (H4)

Petrography: More than 99% of the metal and troilite grains have been weathered to form oxide. Some clay is present. Numerous weathering veins transect the meteorite. Chondrules are well defined. Olivine exhibits undulose extinction. Some low-Ca pyroxene phenocrysts exhibit polysynthetic twinning.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2003
Mass (g):539
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W5
Fayalite (mol%):17.4
Classifier:A. Rubin, UCLA
Type spec mass (g):28.4
Type spec location:UCLA
Main mass:Nick Gessler
Comments:Submitted by Simone de Leuw
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8394 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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