Sample Petrographic Description
Sample Number | LEW 97225 |
Newsletter | 23,2 |
Location | Lewis Cliff |
Field Number | 11054 |
Dimensions (cm) | 1.0 x 0.75 x 1.25 |
Weight (g) | 2.11 |
Original Classification | Ureilite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 11-21;Ferrosilite (mol%): 8-18 | |
Weathering | |
C | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
Smooth brown/black fusion crust completely covers the exterior surface. The interior has a yellowish matrix with heavy oxidation and rust areas. | |
Thin Section Description (,2) - Tim McCoy | |
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. Modest shock effects (e.g., planar fractures) are present. Olivine has cores of Fa21, with rims reduced to Fa11. Most pigeonite is Fs18Wo9 with a single rim value of Fs8Wo9. The meteorite is a ureilite. |
Antarctic Meteorite Images for Sample LEW 97225 | ||||
Thin Section Photo(s) : | ||||