GRD000JS0
I-20
Granodiorite
Unknown
None
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1
Ritter 154 › Cabinet 15 › Drawer N
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Original label: Granodiorite.
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California
Bostonia
Latitude: 32.8°
Longitude: -117.0°
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2.5
plane
Sanidine displaying the concentric zonation.
2.5
crossed
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scan
crossed
GRD000JT0: 50% quartz, 40% sanidine with concentric oscillatory zonation, 5% biotite (often skeletal), 5% amphibole (skeletal), < 1% opaques (C. Eichler)
N/A
N/A