GRD00I1S0
I-734
Basalt
Cenozoic › Paleogene › Paleocene
55.8
-
65.5
1
Ritter 154 › Cabinet 16 › Drawer H
-
Porphrytic (Px, sparse Ol) basalt. Probably part of the 64 Ma Valmont dike.
-
-
Colorado
Valmont (near Boulder)
-
Rim overgrowths on pyroxene, some resorption
2.5
plane
Rim overgrowths on pyroxene, some resorption. Feldspars in matrix.
2.5
crossed
-
scan
crossed
GRD00I1T0: Orthopyroxene, clinopyroxene, and olivine in plagioclase-rich matrix. Abundant small opaques. (C. Eichler)
N/A
N/A