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Northwest Africa 14557
Basic information Name: Northwest Africa 14557
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14557
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 22 g
Classification
  history:
Recommended:  L5    [explanation]

This is 1 of 8222 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 22 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14557 (NWA 14557)

(Northwest Africa)

Purchased: 2020

Classification: Ordinary chondrite (L5)

History: Acquired in 2020 by D. Sheikh from a meteorite dealer in Morocco.

Physical characteristics: Single stone slice containing a dark-brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is an equilibrated ordinary chondrite containing secondary recrystallized plagioclase (~25 µm) and accessory Fe-Ni metal, troilite and chromite.

Geochemistry: Olivine (Fa25.3±0.9, range Fa23.8-26.8, n=12), Low-Ca Pyroxene (Fs21.0±0.9Wo1.2±0.2, range Fs20.2-22.5Wo0.9-1.5, n=11).

Classification: Ordinary Chondrite (L5)

Specimens: 22 g at Cascadia, main mass with Cascadia

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):22
Pieces:1
Class:L5
Shock stage:S4
Weathering grade:W3
Fayalite (mol%):25.3±0.9
Ferrosilite (mol%):21.0±0.9
Wollastonite (mol%):1.2±0.2
Classifier:D. Sheikh, Cascadia
Type spec mass (g):22
Type spec location:Cascadia
Main mass:Cascadia
Comments:Submitted by Daniel Sheikh
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8136 approved meteorites from (Northwest Africa) (plus 1942 unapproved names)

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