Sample No.: PCA91328; 91452; 91467

Location: Pecora Escarpment

Dimensions (cm): 2.2 x 2.1 x 1.0; 2.7 x 2.0 x 0.9; 2.6 x 3.4 x 3.0

Weight (g): 11.0; 7.2; 46.9

Meteorite Type: Chondrite (ungrouped)

Macroscopic Description: Robbie Marlow and Cecilia Satterwhite

Smooth, brown fusion crust covers 50% of each of these three meteorite fragments. Numerous fractures penetrate the interior of PCA91328. The exposed interiors are dark brown to black and fine-grained. A few very small inclusions were noted in PCA91452 and 91467. Weathering is extensive.

Thin Section (PCA91328,2; 91452,2; 91467,2) Description: Brian Mason

The sections show a few c hondrules, up to 0.3 mm across, abundant pyroxene grains (0.02-0.08 mm), and a considerable amount of nickel-iron. The meteorite is severely weathered, with limonitic staining throughout the sections. Most of the pyroxene is close to MgSiO3 in composition, but ranges up to Fs16. The metal contains less than 0.1% Si. The meteorite is classified as an ungrouped chondrite; it is essentially identical with PAT 91546 and ALH 85085 (Earth Planet. Sci. Letters, v. 91, p.1-64,1988).