GRD000QS0
I-27
Syenite
Precambrian › Proterozoic › Mesoproterozoic › Stenian
1000.0
-
1200.0
1
Ritter 154 › Cabinet 15 › Drawer C
perthite
Presumably Grenville. Original label: syenite.
-
-
New York
Walton quadrangle
Latitude: 42.1°
Longitude: -75.1°
-
Large k-spar
2.5
plane
Perthitic potassium feldspar.
2.5
crossed
-
scan
crossed
GRD000QT0: 55% K-spar (microcline, perthitic), 20% Quartz, 5% Plag, 10% Hb, 5% CPX, 5% Biotite, 2% Garnet, 3% opaques. (J. Gee)
N/A
N/A