GRD00TNS0
S-74
Porcellanite
Cenozoic › Neogene › Miocene
5.3
-
23.0
1
Ritter 154 › Cabinet 18 › Drawer N
finely laminated
Monterey Fm., small fracture with offset
-
-
California
Berkeley Hills
Latitude: 37.89°
Longitude: -122.27°
GRD00TNT0: Very small amount of sample on the slide. Laminated, brown, cryptocrystalline quartz. Occasional quartz grains and clusters of fine-grained quartz and opaques. Some quartz exhibits undulose extinction. Dark brown fractures. (C. Eichler)
N/A
N/A