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| Northwest Africa 1099 | |||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 1099 This is an OFFICIAL meteorite name. Abbreviation: NWA 1099 Observed fall: No Year found: 2003 Country: (Northwest Africa) Mass:  140 g | ||||||||||||||||||||||||||
| Classification history: |
This is 1 of 2008 approved meteorites (plus 4 unapproved names) classified as L4. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||
| Comments: | Approved 20 Oct 2018 | ||||||||||||||||||||||||||
| Writeup |
Writeup from MB 107:
Northwest Africa 1099 (NWA 1099) (Northwest Africa) Purchased: 2003 Classification: Ordinary chondrite (L4) Petrography: Metal and sulfide grains are elongated; some metal grains contain small irregular grains of troiite. Chondrules are well defined. A few low-Ca pyroxene grains exhibit polysynthetic twinning. No glassy mesostases occur. Olivine grains exhibit weak mosaic extinction. | ||||||||||||||||||||||||||
| Data from: MB107 Table 0 Line 0: |
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| 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) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||