GRD01USS0
M-80
Non-layered Gneiss
Mesozoic › Cretaceous
65.5
-
145.5
1
Ritter 154 › Cabinet 24 › Drawer B
altered
Plagioclase-biotite-quartz-pyroxene gneiss. Grading to schist. Moderately altered. Original description: granodiorite.
-
-
California
11.8 miles east of Ramona
Latitude: 33.101°
Longitude: -116.679°
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Inclusion-rich plagioclase
2.5
plane
Inclusion-rich plagioclase
2.5
crossed
-
scan
crossed
GRD01UST0: 60% plagioclase (polysynthetic and albite twinning) 20% biotite, 10% quartz, 10% pyroxene. Some plagioclase are inclusion-rich (opaque, pyroxene?) (C. Eichler)
N/A
N/A