Newsletter |
28,1 |
Location |
MacAlpine Hills |
Field Number |
14765 |
Dimensions (cm) |
7.4 x 5.0 x 4.1 |
Weight (g) |
222.16 |
Original Classification |
L3 Chondrite |
Updated Classification |
L3.7 Chondrite |
Fayalite (mol%): 9-27;Ferrosilite (mol%): 2-24 |
B |
A |
Black fusion crust covers 90% of the exterior. The surface is pitted and has oxidation haloes. The interior is dark gray to black with areas of heavy oxidation. Some metal is visible and inclusions are abundant. Inclusions range in size from 1-5 mm and are white and cream in color. |
The section exhibits numerous small, well-defined chondrules (up to 2 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is extremely abundant. The meteorite is moderately weathered. Silicates are unequilibrated; olivines range from Fa9-27 and pyroxenes from Fs2-24. The meteorites are L3 chondrites (estimated subtype 3.7). |
Classification updated to L3.7, as announced in AMN vol. 28, no. 1. |