GRD02A1S0
M-84
Relict Textures
Mesozoic › Cretaceous › Early Cretaceous
99.6
-
145.5
1
Ritter 154 › Cabinet 14 › Drawer O
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Metavolcanic. Small white rounded clasts could be relict phenocrysts. Dark grey angular clasts are quartz. Original description: Metamorphosed quartz porphyry. Lower Cretaceous
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California
Poway. 0.4 mi north of Poway turnoff on Hwy 67.
Latitude: 32.958842°
Longitude: -116.971436°
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Cluster of very small hornblende and opaque crystals
10.0
plane
Cluster of very small hornblende and opaque crystals
10.0
crossed
Relict plagioclase crystals
2.5
plane
Relict plagioclase crystals (simple twinning)
2.5
crossed
-
scan
crossed
GRD02A1T0: Relict plagioclase and quartz crystals in fine-grained quartz groundmass. 75% quartz, 25% plagioclase. Trace very small hornblende and opaques. (C. Eichler)
N/A
N/A