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Northwest Africa 568
Basic information Name: Northwest Africa 568
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 568
Observed fall: No
Year found: 2000
Country: (Northwest Africa)
Mass:help 25.8 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  H5
Recommended:  H5    [explanation]

This is 1 of 10851 approved meteorites (plus 19 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 17 Jun 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 568 (NWA 568)

(Northwest Africa)

Purchased: 2000

Classification: Ordinary chondrite (H5)

History: 1 stone weighing 25.8 g was found in Morocco in 2000. Thomas Webb acquired the sample from Michael Cottingham in November 2000.

Physical characteristics: The oriented stone is brown and flattened in shape. A weathered, dark brown fusion crust covers approximately 60% of the exterior of the stone and displays a continuous rollover lip around the trailing edge. The cut face of the interior of the stone is brown and displays small chondrules, chondrule fragments and fresh and weathered flakes of metal.

Petrography: Description and classification (A. Love, App): Sample is a breccia composed of rounded clasts of recrystallized chondrite, chondrules, chondrule fragments and metal grains. Chondrules within clasts and surorunding clasts have an average diameter of 353 μm.

Geochemistry: (A.Love, App) Olivine Fa18.2±0.2, N=8; Low Ca pyroxene Fs16.9?0.3 Wo1.6±0.2, N=8

Classification: Ordinary chondrite (H5, S3, W1)

Specimens: An endcut weighing 5.8 g, and a polished thin section are currently on deposit at App.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2000
Mass (g):25.8
Pieces:1
Class:H5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):18.2±0.2, N=8
Ferrosilite (mol%):16.9±0.3, N=8
Wollastonite (mol%):1.6±0.2
Classifier:A. Love, App
Type spec mass (g):5.8
Type spec location:App
Main mass:TWebb
Finder:Anonymous
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
TWebb: No contact information provided., United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8394 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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