GRD000US0
I-31
Dacite
Cenozoic › Neogene › Miocene
5.3
-
23.0
1
Ritter 154 › Cabinet 15 › Drawer Q
porphyry,resorption,inclusions
fairly altered
-
Van Winkel Mtns
California
Van Winkel Mtns, 30 mi NE of Amboy
Latitude: 34.99°
Longitude: -115.29°
-
Resorption features in feldspar and amphibole.
2.5
plane
-
2.5
crossed
-
scan
crossed
GRD000UT0: Resorbed plagioclase and saindine with brown glass inclusions and rim overgrowths, amphibole (some skeletal), biotite, opaques (C. Eichler)
N/A
N/A