Meteoritical Bulletin: Entry for Northwest Africa 4990

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Northwest Africa 4990

Basic information

Name: Northwest Africa 4990
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4990
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 70 g

Classification
history:

Meteoritical Bulletin:	MB 93	(2008)	L-melt rock
Recommended:			L-melt rock [explanation]

This is 1 of 52 approved meteorites classified as L-melt rock. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 6 Mar 2008

Data from:
  MB93
  Table 2
  Line 166:

Place of purchase:	Morocco
Date:	2005
Mass (g):	70
Pieces:	1
Class:	L type impact melt
Shock stage:	Melted
Weathering grade:	W1
Fayalite (mol%):	24.3
Ferrosilite (mol%):	20.9
Classifier:	A. Greshake, MNB
Type spec mass (g):	15.5
Type spec location:	MNB
Main mass:	Stehlik

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Stehlik: Harald Stehlik, 1220 Wien, Austria (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)

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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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