Antarctic Search for Meteorites (ANSMET) Search this
Weight:
16.656 g
Place:
Antarctica
Collection Date:
1977
Notes:
# NASA data for ALH 77231 Weathering: A/Be Fracturing: A/B Fa: 24 mol % Fs: 21 mol %
This is a complete specimen, approximately 25.0 x 17.0 x 13.5 cm. All surfaces of the sample are covered with dull black fusion crust. The fusion crust has many polygonal fractures and is approximately 0.5 mm thick. There are several large fractures that cross the surface of the meteorite. There was snow/ice in the fractures when it was removed from cold storage. There are small areas along the fractures where the fusion crust has been removed and reveals greenish-gray material that does not have any obvious inclusions. When the meteorite was sawed a few light color clasts, as much as 1.5 cm in diameter, were observed. The metal in the meteorite has oxidation halos, although the weathering is not extensive.
