Antarctic Search for Meteorites (ANSMET) Search this
Weight:
20.39 g
Place:
Antarctica
Collection Date:
1977
Notes:
# NASA data for ALH 77284 Weathering: A/B Fracturing: B Fa: 25 mol % Fs: 21 mol % ²⁶Al: 45 ± 5 dpm/kg
The fusion crust on this angular stone is less than .5 mm thick, dull black, and covers all but the B surface, which is a planar fracture surface. Rounded and irregular clasts are visible in some areas on the B surface. One large fracture runs the length of the sample. The specimen is approximately 11.0 x 8.0 x 3.5 cm. The material exposed during chipping to obtain a thin section sample, is grayish white and exhibits a few small metallic flakes. A thin, l mm, weathering rind is apparent along the T, S, and N surfaces.
