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| Northwest Africa 12804 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12804 This is an OFFICIAL meteorite name. Abbreviation: NWA 12804 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass:  1200 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 102 approved meteorites classified as LL7. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
| Comments: | Approved 15 Dec 2019 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Northwest Africa 12804 (NWA 12804) (Northwest Africa) Purchased: 2018 Classification: Ordinary chondrite (LL7) History: The meteorite was purchased from a local meteorite dealer in Algeria. Physical characteristics: Dark-grayish rock with some fusion crust. Petrography: The meteorite displays a thoroughly recrystallized texture of dominantly olivine and orthopyroxene grains with relativey high Wo-contents. Plagioclase grains are up to 150 μm in size. One relict chondrule fragment has been found in the 1 × 1.5 cm section. Classification: Petrologic type 7 based on the equilibrated state of olivine and pyroxene, the large grain size of secondary plagioclase, and the high CaO concentration in low-Ca pyroxene. Writeup from MB 108: Northwest Africa 12804 (NWA 12804) (Northwest Africa) Purchased: 2018 Classification: Ordinary chondrite (LL7) History: The meteorite was purchased from a local meteorite dealer in Algeria. Physical characteristics: Dark-grayish rock with some fusion crust. Petrography: The meteorite displays a thoroughly recrystallized texture of dominantly olivine and orthopyroxene grains with relativey high Wo-contents. Plagioclase grains are up to 150 μm in size. One relict chondrule fragment has been found in the 1 × 1.5 cm section. Classification: Petrologic type 7 based on the equilibrated state of olivine and pyroxene, the large grain size of secondary plagioclase, and the high CaO concentration in low-Ca pyroxene. Writeup from MB 108: Northwest Africa 12804 (NWA 12804) (Northwest Africa) Purchased: 2018 Classification: Ordinary chondrite (LL7) History: The meteorite was purchased from a local meteorite dealer in Algeria. Physical characteristics: Dark-grayish rock with some fusion crust. Petrography: The meteorite displays a thoroughly recrystallized texture of dominantly olivine and orthopyroxene grains with relativey high Wo-contents. Plagioclase grains are up to 150 μm in size. One relict chondrule fragment has been found in the 1 × 1.5 cm section. Classification: Petrologic type 7 based on the equilibrated state of olivine and pyroxene, the large grain size of secondary plagioclase, and the high CaO concentration in low-Ca pyroxene. | ||||||||||||||||||||||||||||||
| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names) | ||||||||||||||||||||||||||||||