Antarctic Search for Meteorites (ANSMET) Search this
Weight:
1.36 g
Place:
Antarctica
Collection Date:
1977
Notes:
# NASA data for ALH 77230 Weathering: C Fracturing: B Fa: 22-25 mol % Fs: 18-29 mol % ²⁶Al: 51 ± 3 dpm/kg
This is a subrounded to angular specimen which is nearly a complete stone. A brownish-black fusion crust, approximately .5 to 1 mm thick, covers the specimen, with the exception of small broken surfaces. The portion of the fusion crust that was in contact with the ice has an iridescent-like sheen. The specimen has several surface fissures. The specimen was difficult to chip for thin section material. Snow was present along fissures on the interior of the stone. The surface of the meteorite that was in contact with the ice was more severely weathered than the uppermost portion. Weathering is along fissures to a depth of ~5 mm.
