| GRD01N9S0 |
Augen Gneiss
|
Original description: Monte Rosa augen gniess from a quarry close to photographed outcrop. |
Italy |
0 |
|
| 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 |
| 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 |
| GRD01VJS0 |
Augen Gneiss
|
Quartz-potassium feldspar-plagioclase-biotite gneiss. Potassium feldspar augen. Decent banding and nice lineations. |
|
0 |
Ritter 154, 14 B |
| GRD01X6S0 |
Augen Gneiss
|
Medium-sized sample of gneiss composed of potassium feldspar-quartz-chlorite-muscovite. Well-foliated. Large white potassium feldspar augen. |
Alpine |
1 |
Ritter 154, 14 B |
| GRD01XLS0 |
Augen Gneiss
|
Large sample of gneiss composed of biotite-potassium feldspar-quartz. Potassium feldspar augen. Discontinuous banding. |
|
1 |
Ritter 154, 24 A |
| GRD01XNS0 |
Augen Gneiss
|
Small slab of gneiss composed of quartz-muscovite-potassium feldspar; Foliated/banding. Potassium feldspar augen. |
Alpine |
1 |
Ritter 154, 14 B |
| GRD01XUS0 |
Augen Gneiss
|
Biotite-quartz-potassium feldspar- oxides (trace)- amphibole (trace). Medium-grained. Slight banding with augen. |
California |
0 |
Ritter 154, 24 B |
| GRD01XWS0 |
Augen Gneiss
|
Chlorite-quartz-pyrite (trace) gneiss. Augen/stringers of quartz. Medium-grained. Original description: amphibolite (?). |
Alps |
0 |
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 |
| 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 |
| 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 |
| 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 |
| GRD02T7S0 |
Augen Gneiss
|
Meta-gneiss containing large K-spars(2-3 cm) intermingled with quartz and biotite. Moderately developed foliation |
Brazil |
0 |
Ritter 154, 14 B |
| GRD02VFS0 |
Augen Gneiss
|
Epidote segregation in amphibolite gneiss. |
California |
0 |
Ritter 154, 24 A |
