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Northwest Africa 15620 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15620 This is an OFFICIAL meteorite name. Abbreviation: NWA 15620 Observed fall: No Year found: 2021 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 12401 approved meteorites (plus 8 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 7 Jan 2023 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 112:
Northwest Africa 15620 (NWA 15620) Morocco Purchased: 2021 Dec Classification: Ordinary chondrite (L6) History: Purchased December 2021 by John Humphries from Mark Lyon in Arizona. Physical characteristics: A dark brown weathered stone with caliche, saw cut reveals a mottled shock darkened interior with occasional lighter areas. Ubiquitous metal flecks are visible throughout the sample. Petrography: (D. Dickens, CCMS) Optical and microprobe examination of polished probe mount shows a mostly recrystallized matrix of olivine and pyroxene with relict chondrules. Accessory phases include kamacite, troilite, and plagioclase. Plagioclase grain size is approximately 70 µm. Geochemistry: (D. Dickens, CCMS and A. S. Bell, CUB) Olivine Fa25.7±1.3, n=8; low-Ca pyroxene Fs20.8±0.2Wo1.6±0.2, n=8. Classification: Ordinary chondrite (L6) Specimens: 26 g including the probe mount on deposit at Cascadia | ||||||||||||||||||||||||||||||
Data from: MB112 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) CUB: Daniel Ozdín, Mineralogical Museum of Comenius University, Faculty of Natural Sciences, Ilkovicova 6, 842 15 Bratislava, Slovakia (institutional address; updated 2 Dec 2018) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Photos: |
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Geography:![]() |
Statistics: This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) |