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Northwest Africa 14257 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 14257 This is an OFFICIAL meteorite name. Abbreviation: NWA 14257 Observed fall: No Year found: 2013 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 18 Sep 2021 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 14257 (NWA 14257) Morocco Purchased: 2013 Classification: HED achondrite (Eucrite) History: A single stone found in Morocco by nomads. Purchased by Graham Ensor in Ensisheim, France, in 2013. Date of find unknown. Physical characteristics: Physical Characteristics: 6 pieces - description is of largest stone (~3.5 cm). Dark, sandblasted with intact fusion crust remaining on exterior. Irregular white and grey clasts, no observable melt veins in hand specimen. Petrography: The meteorite displays a relatively coarse-grained texture with larger, subrounded clast of pyroxene (up to ~ 2 mm) and plagioclase (up to ~ 3 mm). Pyroxene exsolution lamellae are observed with a wide range of thicknesses( from ~ 2.5-10 µm). Known accessory phases include: A silica phase and chromite. Geochemistry: Mineral Composition and Geochemistry: (T. J. Barrett, T. S. Hayden, OU) Feldspar (An90Ab10, n = 17), orthopyroxene (Fs54±1En43±2Wo3±1, FeO/MnO = 31±4, Mg# = 44±2, n = 41), pigeonite (Fs50±3En40±2Wo10±4, FeO/MnO = 30±2, Mg# = 45±2, n = 30), augite (Fs27±5En34±2Wo39±6, FeO/MnO = 30±3, Mg# = 56±4, n = 16). Classification: Eucrite Specimens: 25.8 g type specimen held at OU. Graham Ensor holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB110 Table 0 Line 0: |
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Institutions and collections |
OU: Planetary and Space Sciences
Department of Physical Sciences
The Open University
Walton Hall
Milton Keynes
MK7 6AA
United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:![]() |
Statistics: This is 1 of 1929 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater) |