GRD0242S0
RAMA7-Dr22-1
Amphibolite
Mesozoic › Jurassic › Late Jurassic
145.5
-
161.0
1
Ritter 154 › Cabinet 37 › Drawer D
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Large (~9x6x7 cm from the cut face) cut sample. Black crystalline interior. Patchy Fe-Mn crust on sample. Billet pieces. Original label: 28 November, 1980.
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RAMA 7 Dredge 22
Pacific Ocean
Mariana Trench. Original: 11 29.7N, 142 11.6E to 11 30.1N, 142 11.2E. Depth: -7800 to -7680.
Latitude: 11.495°
Longitude: 142.193333°
-7740.0 m a.s.l.
N/A
Amphibole and potassium feldspar
10.0
plane
Amphibole and potassium feldspar
10.0
crossed
-
scan
crossed
GRD0242T0: Thin section is carbon-coated. 50% amphibole (green-brown pleochroic) and 50% potassium feldspar (tartan twinning), minor amount of orthopyroxene (C. Eichler)
N/A
N/A