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Northwest Africa 6818
Basic information Name: Northwest Africa 6818
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6818
Observed fall: No
Year found: 2010
Country: Morocco
Mass:help 132.5 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 528 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 23 Jun 2011
Writeuphelp
Writeup from MB 100:

Northwest Africa 6818 (NWA 6818)

Morocco

Purchased: 2010

Classification: Ureilite

Petrography (P. Warren, UCLA): Mode dominated by olivine (~90%) and pigeonite (~5%). Many olivines are elongated and conspicuously aligned. Olivines are up to 4 mm across, but 1-2 mm is more typical for both olivine and pigeonite. Olivine rims contain abundant submicron-sized metals.

Geochemistry: Olivine cores are Fo78.7; rims zone to at least Fo93.

Data from:
  MB100
  Table 1
  Line 1510:
Place of purchase:Los Angeles
Date:P 2010
Mass (g):132.45
Pieces:1
Class:Ureilite
Shock stage:S2
Weathering grade:W5
Fayalite (mol%):21.3
Ferrosilite (mol%):17.7
Wollastonite (mol%):12.3
Classifier:Paul Warren, UCLA
Type spec mass (g):27.02
Type spec location:UCLA
Main mass:Sean Tutorow
Comments:Submitted by Alan Rubin
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
abibou   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1466 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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