GRD01ZCS0
RAMA7-Dr8-4
Rhyolite
Mesozoic › Cretaceous › Late Cretaceous
65.5
-
99.6
1
Ritter 154 › Cabinet 37 › Drawer A
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Small cut pebble. Looks and feels like a dense form of pumice. Original label: 10 November, 1980.
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RAMA 7 Dredge 8
Pacific Ocean
Philippine Trench. Original: 10 29.9N, 126 31.2E to 10 29.6N, 126 30.9E. Depth: -7950 to -7550.
Latitude: 10.498333°
Longitude: 126.52°
-7750.0 m a.s.l.
N/A
Plagioclase and opaque oxides
5.0
plane
Abundant plagioclase, largest displaying albite twinning and zonation
5.0
crossed
-
scan
crossed
GRD01ZCT0: Very porous; 90% plagioclase (some albite twinning), 5% pyroxene, 5% opaque oxides (C. Eichler)
N/A
N/A