Antarctic Search for Meteorites (ANSMET) Search this
Weight:
0.49 g
Place:
Antarctica
Collection Date:
1977
Notes:
# NASA data for ALH 77304 Weathering: B Fracturing: B Fa: 18-27 mol % Fs: 13-19 mol % ²⁶Al: 50 ± 3 dpm/kg
Dull, brownish-black fusion crust, approximately 0.5 to 1 mm thick, covers all but the W surface of this angular, 9.5x8.0x6.5 cm, sample. On the W surface and areas where the fusion crust has been plucked away, greenish matrix material with numerous chondrules and irregular lithic clasts ranging from light to dark gray and as much as 1 cm in diameter, is exposed. A fracture on the B surface appears to penetrate the entire stone. When the meteorite was cleaved in half, haloing effects were observed around some of the inclusions in the interior of the stone. There is no obvious weathering rind.
