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Northwest Africa 14708
Basic information Name: Northwest Africa 14708
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14708
Observed fall: No
Year found: 2005
Country: Morocco
Mass:help 1295 g
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1999 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 26 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14708 (NWA 14708)

Morocco

Purchased: 2005

Classification: Ordinary chondrite (L4)

History: Sample was purchased at the Denver mineral show in 2005 from A. Aaronson, who acquired it from Morocco. Sample is catalogued at ROM as M59824.

Physical characteristics: Large oriented stone with smooth fusion crust and flow lines eminating from centre of dome-like major surface. Opposite surfaces are covered with irregular fusion crust or are broken surfaces, dun brown weathered and featuring mature desert polish, highlighting chondrules in relief. Physical properties: Magnetic susceptibilty of a 6.20 g specimen is log χ (× 10-9 m3/kg) = 4.26.

Petrography: Cut faces show throughgoing fractures with weathering, cutting a mottled brown interior bearing sparsely disseminated metal grains and aggregates up to 2 mm size. In polished thin section, abundant large chondrules of PO, POP, granular olivine, BO types are well delineated with fine grained rims in a slightly recrystallized matrix. Chondrule mesostses are microcrystalline. Most olivine grains show sharp extinction. Silicates are pervasively Fe stained, and Fe oxides locally surround metal grains.

Classification: Ordinary chondrite: L4 (S1) W2. Abundant large chondrules, low metal content and magnetic susceptibility indicate L chondrite.

Specimens: Type specimen ROM; main mass DGregory

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Denver, USA
Date:P 2005
Mass (g):1294.8
Pieces:1
Class:L4
Shock stage:S1
Weathering grade:W2
Magnetic suscept.:4.26
Classifier:P. McCausland (ROM, UWO), V Di Cecco (ROM)
Type spec mass (g):25.76
Type spec location:ROM
Main mass:DGREGORY
Comments:Submitted by V. Di Cecco, ROM
Institutions
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1902 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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