Newsletter |
28,1 |
Location |
LaPaz Ice Field |
Field Number |
15512 |
Dimensions (cm) |
2.7 x 1.8 x 1.3 |
Weight (g) |
11.28 |
Original Classification |
L3 Chondrite |
Updated Classification |
L3.8 Chondrite |
Fayalite (mol%): 9-31;Ferrosilite (mol%): 1-18 |
B |
A |
Brown/black frothy fusion crust covers 80% of this ordinary chondrite's exterior surface. Flow lines are visible on the surface. The interior is dark gray with high oxidation. Within the matrix are numerous light gray, white and cream colored inclusions. Size ranges from 1-5 mm. |
The section exhibits numerous large (up to 2 mm), well-defined chondrules in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is abundant. The meteorite is moderately weathered. Silicates are unequilibrated; olivines range from Fa9-31 and pyroxenes from Fs1-18. The meteorite is an L3 chondrite (estimated subtype 3.8). |
Classification updated to L3.8, as announced in AMN 28, no. 1. |