GRD001ZS0
I-74
Rhyolite
Cenozoic › Neogene › Miocene
5.3
-
23.0
1
Ritter 154 › Cabinet 15 › Drawer F
Heavy resorption features
Groundmass is glassy. Feldspars in hand sample.
-
Old Dad Mtns
California
Old Dad Mtns, Amboy
Latitude: 34.7°
Longitude: -115.8°
GRD001ZT0: Sanidine (resorbed, some skeletal, some with mafic glass inclusions), plagioclase (often skeletal), biotite (smaller xtals are euhedral), occasional clinopyroxene (resorbed), orthopyroxene (resorbed), and opaques (subhedral), biotite with cpx rims. (C. Eichler)
N/A
N/A