GRD0228S0
RAMA7-Dr17-1
Conglomerate
Mesozoic › Jurassic › Late Jurassic
145.5
-
161.0
1
Ritter 154 › Cabinet 37 › Drawer B
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Large (~7 cm in diameter) round igneous cobble surrounded by a rind of calcium carbonate bearing small (~ 1 mm) subrounded clasts. Billet pieces. Original label: 23 November, 1980.
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RAMA 7 Dredge 17
Pacific Ocean
Mariana Trench. Original: 11 24.8N, 142 09.41E to 11 25.1N, 142 09.3E. Depth: -9050 to -8730.
Latitude: 11.4133°
Longitude: 142.1566°
-8890.0 m a.s.l.
N/A
Large feldspar crystals, lithophysae growth in lower right-hand corner
5.0
plane
Large feldspar crystals (note the zonation), lithophysae growth in lower right-hand corner
5.0
crossed
-
scan
crossed
GRD0228T0: Nice thin section; Potassium feldspar displaying nice concentric zonation and twinning (Some resorption); Pyroxenes; abundant opaque oxides; occasional amphibole; lithophysae-like crystals; Thin section is carbon coated. (C. Eichler)
N/A
N/A