| GRD021BS0 |
Migmatitic Gneiss
|
Very large polished slab. Original description: quartz-biotite-muscovite, Tephorite, Spessortite = lamprophyre, epidote veins. |
BK, NC |
0 |
Ritter 154, 14 R |
| GRD021CS0 |
Layered Gneiss
|
Slab of a gneiss with thin continuous bands. Phologopite- quartz-plagioclase (?). |
|
0 |
Ritter 154, 14 A |
| GRD021DS0 |
Augen Gneiss
|
Medium-sized sample of augen gneiss composed of potassium feldspar-quartz-biotite-amphibole. Sample has discontinuous banding and poorly developed augen. Melanocratic bands: biotite and amphibole; Leucocratic bands: Potassium feldspar and quartz. No rose quartz. Original description: Gneiss with rose quartz augen. |
California |
0 |
Ritter 154, 24 A |
| GRD021ES0 |
Layered Gneiss
|
Plagioclase-quartz-amphibole-biotite-garnet-pyrite (trace). Gradation from schist to gneiss. Gneiss has a slight augen texture. Pyrite and garnets are in leucocratic bands. See also M-111. |
California |
0 |
Ritter 154, 24 B |
| GRD021FS0 |
Schist
|
Large sample of tremolite schist. Well-foliated and coarse-grained. |
|
0 |
Ritter 154, 24 D |
| GRD021GS0 |
Layered Gneiss
|
Medium-sized sample of fine to medium-grained gneiss composed of biotite-quartz-plagioclase. Thick bands of biotite and amphibole with thin continuous and discontinuous bands of quartz and plagioclase (minor). Some green mineral (vesuvianite?) in the leucocratic layers. |
California |
0 |
Camp Elliott |
| GRD021HS0 |
Talc Schist
|
Small sample of chlorite-talc-muscovite (?). Foliated and medium to coarse-grained. Soapy feel. |
|
0 |
Ritter 154, 24 C |
| GRD021IS0 |
Schist
|
Slab of chlorite-quartz-magnetite schist. White delta-clasts (quartz) and euhedral black crystals (magnetite) in green fine-grained chlorite. Poorly foliated. Original description: Chl-Q-Mt metaconglomerate. |
|
0 |
Camp Elliott |
| GRD021JS0 |
Augen Gneiss
|
Polished samples of gneiss composed of potassium feldspar-quartz-biotite. Large potassium feldspar augen in melanocratic layer of biotite and quartz. No prominent banding |
|
0 |
Ritter 154, 14 B |
| GRD021VS0 |
Serpentinite
|
Large, cut sample (~9x8x5 cm from cut face) olive green sample with magnetite lenses. Fe-Mn crust on sample. Billet pieces. Original label: 20 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 B |
| GRD021XS0 |
Serpentinite
|
Medium-sized (~6x4x4.5 cm from the cut face) sample composed of light green and black-dark green spots of serpentine. Abundant magnetite. Billet pieces. Original label: 20 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 B |
| GRD0221S0 |
Serpentinite
|
Large (~8 cm in diameter) uncut dark green sample with a few patches of dull grey magnetite and light green serpentinite. Patchy Fe-Mn crust on sample. Original label: 20 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD0222S0 |
Serpentinite
|
Small (~3 cm in diameter) uncut blue-green sample with light green serpentine and patches of magnetite on the surface. Original label: 20 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD0223S0 |
Serpentinite
|
Small (~3 cm in diameter) uncut blue-green sample with light green serpentine, patches of magnetite, and Fe-oxide stains on the surface. Original label: 20 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD0224S0 |
Serpentinite
|
Large (~8 cm in diameter) uncut sample. Earthy cream-colored surface, but patches in the surface reveal a vitreous light green interior with occasional black crystals (magnetite?). Original label: 20 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD0225S0 |
Serpentinite
|
Medium-sized (~9x6x4 cm) uncut sample. Earthy cream-colored surface, but patches reveal a vitreous light green interior with occasional black crystals (magnetite?). Original label: 20 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD0226S0 |
Serpentinite
|
Small (~3 cm in diameter) uncut sample. Dark green-blue core with patchy Fe-Mn crust on sample. Original label: 20 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD0227S0 |
Serpentinite
|
Very small (~3x2x2 cm) uncut sample. Black Fe-Mn crust covering whole sample. Based on other Dredge 15-6 samples, this may be serpentinite as well. Original label: 20 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD022AS0 |
Amphibolite
|
Large black crystalline (~8 cm) sample. Largest crystals are amphibole, interstital white crystals. Billet pieces. Original label: 23 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 B |
| GRD022HS0 |
Serpentinite
|
Large (~6x6x6 cm) sample with flecks of green-golden chrysotile in green-blue fine-grained groundmass. Patchy Fe-Mn crust on sample. Billet pieces. Original label: 23 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 B |
| GRD022IS0 |
Serpentinite
|
Large (~9x8x7 cm) sample with flecks of green-golden mineral (chrysotile?) and green veins in green-blue fine-grained groundmass. Fe-Mn crust on sample. Original label: 23 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD022JS0 |
Serpentinite
|
Small uncut sample (~6x4x4 cm). Thin blue-green veins in green-blue fine-grained groundmass, patchy Fe-Mn crust on sample. Original label: 23 November, 1980. Challenger Deep. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD022KS0 |
Serpentinite
|
Medium-sized (~7x5x5 cm from the cut face) sample with dark green patches (sheared?) in fine-grained lighter green groundmass, patchy Fe-Mn crust on sample. Billet pieces. Original label: 23 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 B |
| GRD022LS0 |
Serpentinite
|
Medium-sized (~8x5.5x4 cm from the cut face) fine-grained light green with wispy thin veinlets and small patches of golden chrysotile (?) and magnetite crystals, Fe-Mn crust. Bumpy carapace. Billet pieces. Original label: 23 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 B |
| GRD022MS0 |
Serpentinite
|
Small (~7x4x1 cm) green sample. Large white wispy veins cross-cut, thin well-defined veinlets, and golden-brown chrysotile. Billet pieces. Original label: 23 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 B |
| GRD022NS0 |
Serpentinite
|
Large (~9x7x6 cm) uncut sample. Massive dark green groundmass with occasional patches/veins of dark to light blue mineralization. Patchy Fe-Mn crust on sample. Original label: 23 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 B |
| GRD022OS0 |
Serpentinite
|
Large (~11x8x6 cm) sample composed of fine-grained green-blue groundmass. Fe-Mn crust on sample. Original label: 23 November, 1980. Ultramafic (dark) rocks from the Mariana and Tonga Trench. |
Pacific Ocean |
0 |
Ritter 154, 37 C |
| GRD022PS0 |
Serpentinite
|
Cobble (~10x4x9 cm). Very dense. Green-blue fine-grained groundmass. Fe-Mn crust on sample. Original label: 23 November, 1980. Ultramafic (dark) rocks from the Mariana and Tonga Trench. |
Pacific Ocean |
0 |
Ritter 154, 37 C |
| GRD022QS0 |
Serpentinite
|
Large (~13x6x7 cm) sample with green fine-grained groundmass. Patchy Fe-Mn crust on sample. Original label: 23 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 C |
| GRD022RS0 |
Serpentinite
|
Small (~5x3x2 cm) sample. Whiteish glomerocrysts and Fe-oxides in green fine-grained groundmass. Patchy Fe-Mn crust on sample. Original label: 23 November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 C |
