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Northwest Africa 14278
Basic information Name: Northwest Africa 14278
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14278
Observed fall: No
Year found: 2020
Country: Morocco
Mass:help 4.4 kg
Recommended:  L5-melt breccia    [explanation]

This is 1 of 38 approved meteorites classified as L5-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 31 Oct 2021
Writeup from MB 110:

Northwest Africa 14278 (NWA 14278)


Find: 2020

Classification: Ordinary chondrite (L5, melt breccia)

History: Purchased in 2020 by Alex Folta from Mohamed el Guirah in Morocco.

Physical characteristics: Sample displays dark-brown fusion crust. Silicate clasts appear to have been darkened by shock.

Petrography: (D. Sheikh, Cascadia) Sample is a impact melt breccia composed of sub-angular to sub-rounded clasts (up to 2 cm) containing few chondrules (up to 2 mm, n=3), secondary recrystallized feldspar (~ 40 µm, some converted to maskelynite), Fe-Ni metal, and troilite set within a shock melted matrix composed predominantly of impact melt. One Barred Olivine chondrule (~2 mm) found within a clast has been sheared in half along a visible microfault.

Geochemistry: Olivine (Fa24.5±0.4, range Fa23.7-25.1, n=10), Low-Ca Pyroxene (Fs21.2±0.7Wo1.6±0.2, range Fs20.4-22.4Wo1.2-1.7, n=11).

Classification: Ordinary chondrite (L5-melt breccia).

Specimens: 36.1 g and a thin section at Cascadia; 371.3 g main mass with Ralf Simmat.

Data from:
  Table 0
  Line 0:
Mass (g):4400
Class:L5-melt breccia
Shock stage:S5
Weathering grade:W2
Fayalite (mol%):24.5±0.4
Ferrosilite (mol%):21.2±0.7
Wollastonite (mol%):1.6±0.2
Classifier:D. Sheikh, Cascadia
Type spec mass (g):36.1
Type spec location:Cascadia
Main mass:Ralf Simmat
Comments:V3; submitted by Daniel Sheikh
   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)
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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     This is 1 of 2003 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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