| GRD020LS0 |
Layered Gneiss
|
Fine-grained (cryptocrystalline) gneiss with folds and augen. Quartz-pyroxene-pyrite (rare). Foliated with continuous thin bands- relict bedding/laminations (?). |
|
1 |
Ritter 154, 14 B |
| GRD020TS0 |
Augen Gneiss
|
Large sample of a gneiss composed of biotite- potassium feldspar- quartz- pyrite (rare). Potassium feldspar augen and no banding. The largest augen has a bleb of pyrite inside. Original description: Augen gneiss. Microcline porphyroblasts replacing metagreywacke. Qtz-biotite-garnet-microcline. Granulite facies. |
New York |
0 |
Ritter 154, 24 A |
| GRD020US0 |
Non-layered Gneiss
|
Medium-sized slab of fine-grained gneiss composed of quartz-biotite-garnet. Some relict grains. No banding. Original description: metagreywacke; waltons QBG; Qtz-biotite-garnet. |
|
0 |
Camp Elliott |
| GRD020VS0 |
Augen Gneiss
|
Medium-sized sample of coarse-grained gneiss composed of potassium-feldspar-quartz-magnetite-biotite-garnet. Large potassium feldspar augen. One side of the sample is heavily weathered. |
|
0 |
Ritter 154, 24 A |
| GRD020WS0 |
Phyllite
|
Multiple samples of light green fine-grained phyllosilicates with quartz porphyroblasts. Foliated. Dull sheen. Billet. |
|
0 |
Ritter 154, 14 E |
| GRD0214S0 |
Talc Schist
|
Medium-sized sample of talc-magnetite. Massive with little to no foliation. Original description: Soapstone. |
Virginia |
0 |
Ritter 154, 24 C |
| GRD0217S0 |
Amphibole Schist
|
Amphibole-quartz-biotite-plagioclase schist. Faint foliation (slightly granoblastic). Mainly medium-grained. |
|
0 |
Ritter 154, 14 G |
| GRD0218S0 |
Non-layered Gneiss
|
Small sample of coarse-grained gneiss composed of potassium feldspar-quartz-muscovite. Discontinuous/lumpy banding (former augens?). |
Alpine |
1 |
Ritter 154, 24 A |
| 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 |
| GRD024NS0 |
Schistose
|
Two cut slabs measuring ~6x6x1 cm each. Composed of soft black-blue lenses in medium-grained light (micaceous?) matrix. Billet pieces. Original label: 28, November, 1980. |
Pacific Ocean |
1 |
Ritter 154, 37 D |
| GRD024US0 |
Schist
|
Two small (both measuring ~5x5x2.5cm from the cut faces). Exterior of the sample appears to be limey with occasional small muscovite patches. Interior has some grey patches and glaucophane(?) Billet pieces. Original label: 28 November, 1980 |
Pacific Ocean |
1 |
Ritter 154, 37 D |
| GRD024VS0 |
Schist
|
Large (~8x7x3 cm), uncut sample. Exterior of the sample appears to be limey with small lithic fragments in the limey matrix. Also in the rind are small books of muscovite (silver) and glaucophane (blue). Original label: 28 November, 1980 |
Pacific Ocean |
0 |
Ritter 154, 37 D |
| GRD024WS0 |
Schist
|
Two, small (~3x3x1 cm each), uncut samples. White, powdery texture. Original label: 28 November, 1980. |
Pacific Ocean |
0 |
Ritter 154, 37 D |
| GRD029ZS0 |
Layered Gneiss
|
Coarse-grained potassium feldspar-quartz-biotite gneiss. Thin continuous and discontinuous bands. |
|
0 |
Ritter 154, 24 A |
| GRD02A5S0 |
Non-layered Gneiss
|
Large sample of muscovite-quartz-chloritoid (?) gneiss. Discontinuous quartz bands. Medium- to coarse-grained. Original description: Mu-Q gneiss. Chlorite zone. |
New Zealand |
0 |
Ritter 154, 14 R |
| GRD02ADS0 |
Schist
|
Tremolite-pyroxene (grey)-plagioclase-quartz-Fe-oxide schist. |
|
1 |
Ritter 154, 24 C |
| GRD02AIS0 |
Sil-bearing Schist
|
Large sample of magnetite-quartz-sillimanite schist. |
New York |
1 |
Ritter 154, 14 R |
| GRD02BRS0 |
Non-layered Gneiss
|
Quartz-muscovite-biotite gniess. Poorly developed lineations of biotite. |
Alpine |
2 |
Ritter 154, 24 A |
| GRD02BVS0 |
Phyllite
|
Chlorite phyllite. Black veinlet. Original description: metagreywacke. |
California |
1 |
Ritter 154, 14 E |
| GRD02BYS0 |
Ga-bearing Schist
|
Muscovite-quartz-amphibole-garnet-chlorite-pyrite- Fe-oxide (trace). Porphyroblasts of garnets and quartz. Nice sample. |
|
0 |
Ritter 154, 24 C |
| GRD02BZS0 |
Layered Gneiss
|
Phlogopite-biotite (?)-quartz gneiss. Thin bands of phyllosilicates and quartz. |
|
0 |
Ritter 154, 24 A |
| GRD02EGS0 |
Phyllite
|
Slab of black phyllite. Perfect slaty cleavage. Books of mica at oblique angles to cleavage. |
|
0 |
Ritter 154, 14 E |
