| GRD00VUS0 |
Slate
|
Red slate, Nettawee Slate, Cambrian. No hand sample; Thin section in thin section only case in RH 154. |
New York |
1 |
Ritter 154 |
| GRD01GBS0 |
Non-layered Gneiss
|
Original description: Specimen from gneissic rocks at Lizard Point, Late Paleozoic. |
United Kingdom |
0 |
Camp Elliott |
| GRD01N9S0 |
Augen Gneiss
|
Original description: Monte Rosa augen gniess from a quarry close to photographed outcrop. |
Italy |
0 |
|
| GRD01UPS0 |
Non-layered Gneiss
|
Quartzofeldspathic-muscovite-biotite. Moderately gneissic. Recrystallized vein composed of quartz and pink potassium feldspar. |
|
1 |
Ritter 154, 14 A |
| GRD01UQ |
Non-layered Gneiss
|
Amphibole-potassium feldspar gneiss. Original description: "Quartz-hornblende syenite gneiss". |
Ontario |
0 |
Ritter 154, 14 A |
| GRD01UQS0 |
Non-layered Gneiss
|
Amphibole-potassium feldspar gneiss. Original description: Quartz-hornblende syenite gneiss. |
Ontario |
0 |
Camp Elliott |
| GRD01URS0 |
Non-layered Gneiss
|
Quartzofeldspathic gneiss. Plagioclase-quartz-garnet-biotite. Garnet porphyroblasts and thin wispy biotite bands. Original description: Granitized greywacke |
New York |
0 |
Ritter 154, 14 A |
| GRD01US |
Non-layered Gneiss
|
Plagioclase-biotite-quartz-pyroxene gneiss. Grading to schist. Moderately altered. Original description: "granodiorite". |
California |
0 |
Ritter 154, 14 A |
| GRD01USS0 |
Non-layered Gneiss
|
Plagioclase-biotite-quartz-pyroxene gneiss. Grading to schist. Moderately altered. Original description: granodiorite. |
California |
1 |
Ritter 154, 24 B |
| GRD01UTS0 |
Augen Gneiss
|
Plagioclase-quartz-biotite. A few plagioclase augen. moderate banding. Good foliation. |
California |
1 |
Ritter 154, 14 A |
| GRD01UUS0 |
Augen Gneiss
|
Plagioclase-quartz-amphibole-biotite-garnet. Medium- to coarse-grained. Gradation from schist to gneiss. Gneiss has potassium feldspar augen and banding. See also M-110. |
California |
0 |
Ritter 154, 14 A |
| GRD01UV |
Non-layered Gneiss
|
Potassium-feldspar-quartz-amphibole-biotite. Discontinuous banding and coarse-grained (K-spar ~1 x 3 cm). |
|
0 |
Ritter 154, 14 A |
| GRD01UVS0 |
Non-layered Gneiss
|
Potassium-feldspar-quartz-amphibole-biotite. Discontinuous banding and coarse-grained (K-spar ~1 x 3 cm). |
|
0 |
Ritter 154, 14 A |
| GRD01UWS0 |
Non-layered Gneiss
|
Primary large pink potassium feldspar with interstital quartz, amphibole, and biotite. Medium- to fine-grained. Recrystallized. |
|
0 |
Ritter 154, 24 A |
| GRD01UXS0 |
Layered Gneiss
|
Quartz-amphibole-garnet-plagioclase. Medium-grained (max grain size: 2-3 mm). One large porphyroblast. Original description: Serpentinized gneiss. |
|
0 |
Ritter 154, 24 A |
| GRD01UYS0 |
Layered Gneiss
|
Amphibole (hornblende)-quartz-plagioclase-garnet (rare). Nice mineral segregation between leucocratic (quartz) and melanocratic (hornblende) layers. |
|
0 |
Ritter 154, 14 A |
| GRD01UZS0 |
Layered Gneiss
|
Amphibole-plagioclase-garnet-biotite-epidote gneiss. Bands of epidote-garnet and amphibole. Epidote only in leucocratic bands. |
|
0 |
Ritter 154, 24 B |
| GRD01V0S0 |
Augen Gneiss
|
Small sample of gneiss composed of muscovite-biotite-quartz-potassium feldspar. Large augen, some with rim overgrowths. |
Switzerland |
0 |
Ritter 154, 14 A |
| GRD01V1S0 |
Layered Gneiss
|
Gneiss composed of quartz-feldspar-amphibole (good crystal structure)-garnet. Medium to coarse-grained (max crystal size ~7 mm). Some banding is visible. |
|
5 |
Ritter 154, 3 H |
| GRD01V2S0 |
Schist
|
Large sample of coarse-grained schist composed of biotite-muscovite-plagioclase-potassium feldspar-quartz. Foliated with little to no banding. Alpine schist? Original label: Zone 7. |
New Zealand |
0 |
Ritter 154, 14 C |
| GRD01V3S0 |
Layered Gneiss
|
Medium-sized sample of gneiss composed of amphibole-plagioclase-potassium feldspar-quartz-biotite. Lineations are present. Bands of potassium feldspar and quartz within thick melanosomes of amphibole-plagioclase-minor biotite. |
|
0 |
Ritter 154, 24 A |
| GRD01V4S0 |
Non-layered Gneiss
|
Garnet gneiss with poorly developed foliation. Quartz-plagioclase-garnet-biotite. Original label: Sillimanite-garnet gneiss. |
New York |
0 |
Ritter 154, 14 A |
| GRD01V5S0 |
Phyllite
|
Phyllite composed of fine-grained mica and some quartz. Original description: fine-grained gneiss. |
|
0 |
Ritter 154, 14 E |
| GRD01V6S0 |
Layered Gneiss
|
Well-banded gneiss composed of biotite-quartz-plagioclase (trace). |
California |
0 |
Ritter 154, 24 B |
| GRD01V7S0 |
Layered Gneiss
|
Multiple small samples of gneiss composed of potassium feldspar-quartz-biotite-plagioclase (trace). Granulite facies (?). Elongated Kspar, quartz, and biotite (lineations); augen texture perpendicular to elongation. |
|
0 |
Camp Elliott |
| GRD01V8S0 |
Layered Gneiss
|
Large sample with thin, continuous bands. Biotite-amphibole (?)- plagioclase- quartz-potassium feldspar- Fe-oxide (trace). Small stringers of quartz-Kspar. |
|
0 |
Ritter 154, 14 I |
| GRD01V9S0 |
Layered Gneiss
|
Large sample of gneiss composed of hornblende/amphibole-quartz-potassium feldspar-plagioclase (trace)-biotite (trace). Nice lineations in one plane with nice foliation in another; fine biotite (?) veinlets perpendicular to lineation and foliation. |
|
0 |
Ritter 154, 14 B |
| GRD01VBS0 |
Non-layered Gneiss
|
Large sample with thin, discontinuous bands. Fine-grained quartz-plagioclase-biotite. |
|
0 |
Ritter 154, 24 B |
| GRD01VCS0 |
Non-layered Gneiss
|
Six small samples. Potassium feldspar-quartz-amphibole-biotite. Discontinuous banding. |
|
0 |
Ritter 154, 24 A |
| GRD01VES0 |
Slate
|
Fine grained purple slate with leach spots. Poorly developed slaty cleavage. Original description: Argillite, Crystal Spring formation. |
California |
0 |
Ritter 154, 14 F |
