Sample Petrographic Description
Sample Number | LAR 12249 |
Newsletter | 36,2 |
Location | Larkman Nunatak |
Field Number | 23958 |
Dimensions (cm) | 5.0 x 5.0 x 2.5 |
Weight (g) | 80.07 |
Original Classification | Howardite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 20-56 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite | |
30% of the rough textured exterior has pitted, black fractured fusion crust. Exposed areas without fusion crust are gray in color with light and weathered inclusions. The coarse grained, gray interior has numerous light, dark and weathered inclusions. Some oxidation is present. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
The section shows a groundmass of comminuted pyroxene and plagioclase (up to 0.5 mm) with fine- to coarse-grained basaltic and diogenitic clasts ranging up to 5 mm. Pyroxene compositions range from Fs20-56Wo1-45. Fe/Mn is 27-32. The meteorite is a howardite. |
Antarctic Meteorite Images for Sample LAR 12249 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12249 | ||||
Thin Section Photo(s) : | ||||