Sample Petrographic Description
Sample Number | GRA 06178 |
Newsletter | 32,2 |
Location | Graves Nunataks |
Field Number | 17765 |
Dimensions (cm) | 3.4 x 3.0 x 2.0 |
Weight (g) | 36.99 |
Original Classification | L3.5 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 7-35;Ferrosilite (mol%): 2-5 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite | |
85% of this ordinary chondrite‘s exterior is covered with brown/black fusion crust with some oxidation. The interior is a dark gray to black matrix with abundant chondrules and inclusions of various sizes and colors. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Linda Welzenbach | |
The section exhibits numerous large (up to 2 mm), well-defined chondrules in a dark matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Staining from weathering is pervasive. Silicates are unequilibrated; olivines range from Fa7-35 and pyroxenes from Fs2-5. The meteorite is an L3 chondrite (estimated subtype 3.5). |
Antarctic Meteorite Images for Sample GRA 06178 | ||||
Thin Section Photo(s) : | ||||