Antarctic Search for Meteorites (ANSMET) Search this
Weight:
7.62 g
Place:
Antarctica
Collection Date:
1978
Notes:
# NASA data for ALH 78104 Weathering: B Fracturing: A Fa: 24 mol % Fs: 20 mol % ²⁶Al: 53 ± 3 dpm/kg
The W surface of the meteorite is partially covered with black fusion crust, which is weathering away. The remainder of the specimen is rough on a centimeter scale, and is weathered and stained by iron-oxidation. A large clast, ~7 mm, is present on the N surface, and a smaller clast, ~3 mm, that appears metallic is present on the T surface. A number of smaller clasts, which appear to be metallic, are scattered over the surface of the specimen. When the specimen was cleaved during processing, a light gray matrix with metallic particles was exposed. An area ~1 cm x 3 cm in the matrix is a darker gray. A weathering rind, ~5 mm deep, occurs along some exterior margins.
