GRD0013S0
I-41
Andesite
Cenozoic › Neogene › Miocene
5.3
-
23.0
1
Ritter 154 › Cabinet 16 › Drawer A
resorption,porphyry
-
-
Van Winkel Mtns
California
Van Winkel Mtns, 30 mi NE of Amboy
Latitude: 34.99°
Longitude: -115.29°
-
-
2.5
plane
feldspar glomercryst and euhedral biotite.
2.5
crossed
-
scan
crossed
GRD0013T0: Resorbed plagioclase, sanidine (concentric oscillatory zonation), amphibole, biotite (with zircon inclusions), crystal aggregate composed of biotite, amphibole, and plagioclase, trace oxides (C. Eichler)
N/A
N/A