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Northwest Africa 1918 | |||||||||||||
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Basic information | Name: Northwest Africa 1918 This is an OFFICIAL meteorite name. Abbreviation: NWA 1918 Observed fall: No Year found: 2003 Country: Morocco Mass: ![]() | ||||||||||||
Classification history: |
This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||
Comments: | Approved 3 Feb 2006 | ||||||||||||
Writeup![]() |
Writeup from MB 90:
Northwest Africa 1918 Morocco Find: January 2003 Achondrite (eucrite, basaltic) History: DGregory purchased a complete, fusion-crusted stone weighing 136 g from a Moroccan dealer in January 2003. Petrography: (A. Irving and S. Kuehner, UWS) Unbrecciated, with subophitic texture of dark grey pigeonite grains and groups of small anorthite laths, ilmenite (with rare baddeleyite inclusions), troilite, and Ni-free metal. Geochemistry: Some of the large pigeonite grains have ribbon-like clinopyroxene exsolution lamellae within host orthopyroxene (Fs61.6Wo1.4; FeO/MnO = 33.7); clinopyroxene (Fs29.6Wo39.2; FeO/MnO = 29.2) occurs also as discrete grains along with silica. Classification: Achondrite (eucrite, basaltic). Specimens: A 20.2 g type specimen and one polished thin section are on deposit at UWS. DGregory holds the main mass. | ||||||||||||
Data from: MB90 Table 2 Line 7: |
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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) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Geography:![]() |
Statistics: This is 1 of 1929 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater) |