Sample Petrographic Description
Sample Number | PCA 02019 |
Newsletter | 27,1 |
Location | Pecora Escarpment |
Field Number | 13646 |
Dimensions (cm) | 2.5 x 2.5 x 1.5 |
Weight (g) | 11.70 |
Original Classification | Howardite |
Pairing | PCA 02009; PCA 02013; PCA 02014; PCA 02015; PCA 02016; PCA 02018; PCA 02019; PCA 02065; PCA 02066; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 28;Ferrosilite (mol%): 24-55 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
Fusion crust ranges from black to brown and is shiny and glassy with oxidation haloes. The interiors of these howardites are a gray to black matrix with some oxidation and multicolored inclusions. | |
Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
These sections are similar enough that a single description will suffice. Each show a groundmass of comminuted pyroxene (up to 2 mm) and plagioclase with fine- to coarse-grained basaltic, impact-melt and diogentitic clasts ranging up to 3 mm. Minerals include abundant orthopyroxene with compositions ranging from Fs17-60Wo2-8 (Fe/Mn ~29), augite of Fs~40, plagioclase (An90-95) and SiO2. These meteorites are howardites. They are almost certainly paired with each other and with PCA 02016. |
Antarctic Meteorite Images for Sample PCA 02019 | ||||
Lab Photo(s) : | ||||