GRD01XQS0
M-85
Schist
Mesozoic › Cretaceous
65.5
-
145.5
1
Ritter 154 › Cabinet 24 › Drawer C
medium-grained
Medium-sized quartz-biotite-plagioclase-muscovite schist. Some banding and yellow sulfur mineralization. Original description: hornblende schist; Jurassic-Cretaceous.
-
-
California
Julian, Highway 78, milepost E1.5
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Biotite-muscovite-opaque band (upper portion) and quartz band (lower portion)
2.5
plane
Biotite-muscovite-opaque band (upper portion) and quartz band (lower portion)
2.5
crossed
-
scan
crossed
GRD01XQT0: 65% quartz, 20% biotite, 10% muscovite, 5% plagioclase. Minor amount of acicular opaques. Biotite, muscovite, and opaques are typically concentrated into bands. (C. Eichler)
N/A
N/A