Sample Petrographic Description
Sample Number | LAP 031252 |
Newsletter | 29,2 |
Location | LaPaz Ice Field |
Field Number | 16094 |
Dimensions (cm) | 1.5 x 1.0 x 0.5 |
Weight (g) | 0.80 |
Original Classification | CM1 Chondrite |
Weathering | |
Be | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior is covered with brown/black fusion crust with polygonal fractures. | |
Thin Section Description (,2) - Tim McCoy | |
The section consists of a few small chondrules (up to 0.5 mm) that have been completely replaced by phyllosilicate set in an Fe-rich serpentine matrix. No isolated mineral grains or CAIs are apparent; sulfide and carbonate grains are present. Unaltered olivine or pyroxene grains of sufficient size for microprobe analyses were not found. The meteorite is a highly altered CM1 chondrite. |