Sample No.: MAC88107

Location: MacAlpine Hills

Dimensions (cm): 8.5x4.5x3

Field Number: 5554 '

Weight (g): 192.8

Meteorite Type: C2 chondrite

Macroscopic Description: René Martinez

Eighty percent of this carbonaceous chondrite is covered by black fractured fusion crust. Overall it is shaped like a wedge with rounded edges. The interior is very fine grained and black. Light colored <1 mm inclusions are evenly distributed. A thin weathering rind (-1 mm) is marked by a thin discontinuous layer of evaporite just under the fusion crust.

Thin Section (,2) Description; Brian Mason

The section shows abundant small chondrules, averaging about 0 3 mm in diameter, and numerous mineral aggregates and mineral grains, set in a black matrix. Most of the chondrules consist, of granular olivine and olivine-pyroxene; one fine-grained radiating pyroxene was seen. Accessory amounts of finely-dispersed nickel-iron and sulfide are present. Microprobe analyses show that much of the olivine is near forsterite in composition, but occasional iron-rich grains are present (the overall range is Fa0.5-39, with a mean of Fa8). Pyroxene composition range is Fs0.8-9. The meteorite is a C2 carbonaceous chondrite.