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| Northwest Africa 16810 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 16810 This is an OFFICIAL meteorite name. Abbreviation: NWA 16810 Observed fall: No Year found: 2023 Country: (Northwest Africa) Mass:  1039 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 81 approved meteorites classified as L6-melt breccia. [show all] Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
| Comments: | Approved 21 Jul 2024 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 113:
Northwest Africa 16810 (NWA 16810) (Northwest Africa) Purchased: 2023 Feb Classification: Ordinary chondrite (L6, melt breccia) History: Purchased in February, 2023, by Richard Rexeisen at the Tucson Gem and Mineral show in Tucson, AZ. Physical characteristics: Single weathered stone with dark brown fusion crust. Petrography: (D. Sheikh, Cascadia) Specimen is an equilibrated ordinary chondrite comprised of mm-sized lithic clasts and clast fragments, and few chondrules, set within a matrix comprised of melt rock. Feldspar grain sizes various across the sample depending on the clast (but is primarily >50 μm), some of which appears smooth and displays a flow-like texture containing smaller, rounded inclusions of olivine and pyroxene. Accessory phases identified include Fe-Ni metal, troilite, chromite, and Ca-phosphates. Geochemistry: Olivine (Fa25.0±0.2, range Fa24.6-25.5, n=26), Low-Ca Pyroxene (Fs21.3±0.4Wo1.6±0.7, range Fs20.4-22.7Wo1.1-3.3, n=25). Classification: Ordinary Chondrite (L6-melt breccia). Specimens: 29.2 g at Cascadia, main mass with Richard Rexeisen. | ||||||||||||||||||||||||||||||
| Data from: MB113 Table 0 Line 0: |
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| Institutions and collections |
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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| Geography: |
Statistics: This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names) | ||||||||||||||||||||||||||||||