Sample No.: ALH85010, 85011, 85012

Location: Allan Hills

Field Nos.: 2294; 2653; 2221

Weight (g): 3.2; 10.7; 3.9

Dimensions (cm): 2x1x0.5; 2.5x2.5x3; many small pieces

Meteorite Type: C2 Chondrite

Macroscopic Description: René Martinez

Thick fusion crust is present on some of these carbonaceous chondrite fragments and not on others. All specimens have small (<1 mm) white rounded and irregular inclusions set in a fine-grained black matrix. Each fragment of ALH85012 has small amounts of evaporite deposit present. Visible oxidation is minor.

Thin Section (ALH85005,4) Description: Brian Mason

The section consists largely of black opaque matrix, through which are scattered small mineral grains (up to 0.2 mm) and sparse chondrules and chondrule fragments. The chondrules and most of the mineral grains consist of olivine, usually close to Mg2SiO4 in composition but with some more iron-rich. Pyroxene is less common, and is close to MgSiO3 in composition. A few grains of calcite were noted. The meteorite is a C2 chondrite; ALH85010, 85011, and 85012 as well as ALH85007, 85008, 85009, and 85013 are very similar to ALH85005 and the possibility of pairing should be considered.