Newsletter |
28,1 |
Location |
MacAlpine Hills |
Field Number |
14072 |
Dimensions (cm) |
4.0 x 3.2 x 3.2 |
Weight (g) |
62.41 |
Original Classification |
L3 Chondrite |
Updated Classification |
L3.4 Chondrite |
Pairing |
MAC 02467;
MAC 02501;
MAC 02509;
|
Fayalite (mol%): 0-25;Ferrosilite (mol%): 1-20 |
B |
A |
The exterior has brown/black fusion crust with oxidation haloes visible. The interior is dark gray to black with some rusty areas. Gray, white, and rusty millimeter sized inclusions are visible. |
These meteorites are so similar that a single description suffices. The sections exhibit numerous large (up to 4 mm), well-defined chondrules in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is present. Weathering ranges from minor to moderate. Silicates are unequilibrated; olivines range from Fa0-25 and pyroxenes from Fs1-20. The meteorites are L3 chondrites (estimated subtype 3.4). |
Classification updated to L3.4, as announced in AMN vol. 28, no. 1. |