Newsletter |
39,1 |
Location |
Larkman Nunatak |
Field Number |
22630 |
Dimensions (cm) |
4.5 x 3.5 x 1.5 |
Weight (g) |
41.70 |
Original Classification |
Ureilite |
Fayalite (mol%): 3-17;Ferrosilite (mol%): 6-10 |
Ae |
A/B |
Black fusion crust covers 70% of the fractured exterior. Some of the fusion crust has a vesicular appearance and minor evaporites are visible. The exposed surface is covered in dark reddish brown rust. Interior is a gray matrix with black elongated grains, 1 mm in length with minor amounts of orange rust present. |
The section consists of an aggregate of large olivine and pyroxene grains up to 3 mm across. Individual grains are rimmed by carbon-rich material containing particles and stringers of metal and rare sulfide. Olivine and pyroxene grains have been extensively mosaicized by shock. Olivine compositions are Fa3-17. Pyroxene compositions are Fs6-10Wo19-34. The meteorite is a ureilite. |