Sample No.: PCA91082

Location: Pecora Escarpment

Dimensions (cm): 4.0 x 2.5 x 1.7

Weight (g): 37.9

Meteorite Type: C2R Chondrite

Macroscopic Description: Cecilia Satterwhite

The fusion crust on this sample is black, fractured, and shiny in areas. The interior is made up of jet black matrix with abundant light inclusions. The inclusions are very small but can be discerned with the naked eye. Some evaporite deposit was noted as was oxidized matrix.

Thin Section (,2) Description: Brian Mason

The section shows a close-packed aggregate of large chondrules (maximum diameter 3 mm) rimmed with black matrix. About 10% of nickel-iron is present, in part concentrated as rims to the chondrules; troilite is present in small amount; about 1%. Chondrule types include granular olivine, barred olivine, and granular clinoenstatite (polysynthetically twinned). The matrix includes some pale green phyllosilicate. Weathering is indicated by pervasive limonitic staining. Microprobe analyses show Mg-rich olivine and pyroxene of somewhat variable composition; olivine, Fa1-5; pyroxene, Fs1-8. The meteorite is tentatively classified as a C2 chondrite of Renazzo subtype, although the amount of carbonaceous matrix is unusually low.