Sample Petrographic Description
Sample Number | LAP 04779 |
Newsletter | 30,1 |
Location | LaPaz Ice Field |
Field Number | 17823 |
Dimensions (cm) | 1.0 x 1.0 x 1.0 |
Weight (g) | 1.85 |
Original Classification | Ureilite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 4-22 | |
Weathering | |
C | |
Fracturing | |
B/C | |
Macroscopic Description - Kathleen McBride | |
40% of the exterior surface has brown/black fusion crust. The soft interior is rusty black and very weathered. | |
Thin Section Description (,2) - Tim McCoy, Valerie Reynolds | |
The section consists of an aggregate of large olivine and pyroxene grains up to 2 mm across. Individual olivine grains are rimmed by carbon-rich material containing traces of metal. Olivine has cores of Fa22, with rims reduced to Fa4. The meteorite is a ureilite. |