Newsletter |
29,2 |
Location |
LaPaz Ice Field |
Field Number |
16958 |
Dimensions (cm) |
2.0 x 1.5 x 1.25 |
Weight (g) |
4.34 |
Original Classification |
Eucrite (Brecciated) |
Pairing |
LAP 031190;
LAP 031379;
|
Ferrosilite (mol%): 25-57 |
A/B |
A/B |
The exterior surface has black/brown fusion crust, shiny on some surfaces, dull on others. The exterior is a gray matrix with little rust and dark gray and white angular clasts. |
These meteorites are so similar that a single description suffices. The meteorites are dominated by fine-grained (~200 micron average grain size) basaltic material with patches of interlocking euhedral plagioclase crystals up to 1 mm and basaltic clasts up to 1 mm. Weathering is moderate. Mineral compositions are homogeneous with orthopyroxene (Fs56Wo3), with lamellae of augite (Fs25Wo43), and plagioclase (An89Or0.5). The Fe/Mn ratio of the pyroxene is ~29. The meteorites are brecciated eucrites. |