GRD00DQS0
I-540
Gabbro
Mesozoic › Cretaceous
65.5
-
145.5
0
Ritter 154 › Cabinet 16 › Drawer C
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Medium-grained amphibole and plagioclase crystals.
no. 5, Table 5, p. 50 (Larsen, 1948). USGS standard (see Flanagan, 2007)
-
California
San Marcos Mtn