Newsletter for Orphaned Meteorites from USA – Volume 1 No. 2 -- March 2015
by Robert Verish

Bob's Bulletin

A newsletter for "orphaned" meteorites from the USA.

Petrographic Description for Meteorite A050903

Field ID Number A050903
Newsletter 01-2
Location Arizona, USA
Thin-section ID Number RSV062
Dimensions 3.0cm x 2.4cm x 1.5cm
Weight 35.85 grams
Type Specimen 9.85 grams - endcut
Class Ordinary Chondrite
Weathering Grade high (very likely above "W4")
Shock Stage low (most likely below "S3")
Macroscopic Description -- R. Verish
The exterior of this ordinary chondrite has dark-brown, relict fusion crust. The interior is a dark brown matrix with low metal content and the chondrules and inclusions are small and indistinct.
Thin Section Description -- R. Verish
The section exhibits a variety of chondule sizes (but only up to 2 mm), and nearly all are poorly-defined in a dark grayish-brown matrix of fine-grained silicates, troilite and rare metal. The meteorite is highly weathered. Very weak mosaic shock effects are present. Silicates are equilibrated (plagioclase grains average 40 µm in size). This meteorite is probably an equilbrated H-chondrite.
USA Orphaned Meteorite Images for Specimen ID# A050903
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