GRD024HS0
RAMA7-Dr22-9(1)
Gabbro
Mesozoic › Jurassic › Late Jurassic
145.5
-
161.0
1
Ritter 154 › Cabinet 37 › Drawer D
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Two small cut samples measuring ~3x3x2.5 cm and ~2x2x1 cm from the cut faces. Interior composed of dark green crystals in finer-grained grey to white matrix. White crystalline rind. 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
Pinkish crystals are opx and green blebs are ferroaugite replacing opx(?); fractured plagioclase
2.5
plane
Polysynthetic twinning in plagioclase; orthopyroxene
2.5
crossed
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scan
crossed
GRD024HT0: 60% feldspar (plagioclase, K-spar, and altered feldspar), 20% greenish blebs (orthopyroxene replaced by ferroaugite), 20% orthopyroxene, trace amount of opaques (C. Eichler)
N/A
N/A