| GRD01XPS0 |
Lineation
|
Large sample of gneiss composed of plagioclase-biotite-quartz. Well-foliated with lineations. Fine- to medium-grained. Original description: hornblende gneiss or amphibolite; Jurassic-Cretaceous. |
California |
1 |
Ritter 154, 24 I |
| GRD01XQS0 |
Schist
|
Medium-sized quartz-biotite-plagioclase-muscovite schist. Some banding and yellow sulfur mineralization. Original description: hornblende schist; Jurassic-Cretaceous. |
California |
1 |
Ritter 154, 24 C |
| GRD01XRS0 |
Amphibole Schist
|
Small sample of amphibole-quartz-muscovite-glaucophane(?) schist. Original description: glaucophane schist. Jurassic? |
Mexico |
1 |
Ritter 154, 24 C |
| GRD01XSS0 |
Blueschist
|
Blueschist composed of magnesioreibeckite(?)-Fe-oxides-quartz-Cu-mineralization. Small sample is friable. Some quartz banding in the larger sample. Franciscan? |
|
1 |
Ritter 154, 24 C |
| GRD01XSS1 |
Blueschist
|
Blueschist composed of magnesioreibeckite(?)-Fe-oxides-quartz-Cu-mineralization. Small sample is friable. Some quartz banding in the larger sample. Franciscan? |
|
1 |
Ritter 154, 14 C |
| GRD01XTS0 |
Blueschist
|
Medium-sized sample of poorly foliated blueschist. Glaucophane with large calcite band. |
|
0 |
Ritter 154, 24 C |
| GRD01XUS0 |
Augen Gneiss
|
Biotite-quartz-potassium feldspar- oxides (trace)- amphibole (trace). Medium-grained. Slight banding with augen. |
California |
0 |
Ritter 154, 24 B |
| GRD01XVS0 |
Schist
|
Medium-sized sample of quartz-talc-biotite-muscovite schist. Well-foliated. Large quartz augen (relict pebble?) |
Alps |
1 |
Ritter 154, 14 D |
| GRD01XWS0 |
Augen Gneiss
|
Chlorite-quartz-pyrite (trace) gneiss. Augen/stringers of quartz. Medium-grained. Original description: amphibolite (?). |
Alps |
0 |
Ritter 154, 14 B |
| GRD01XXS0 |
Greenschist
|
Small sample of greenschist, composed of amphibole-quartz-chlorite-biotite-calcite/carbonate. Poorly foliated and medium- to coarse-grained. |
|
1 |
Ritter 154, 14 C |
| GRD01XYS0 |
Lineation
|
Medium-sized sample of a geniss compsed of quartz-plagioclase-potassium-feldspar (?)-biotite. Medium-grained and well-foliated. Not the best example of a gneiss, but a good sample of lineations. N30E dip 30 plunge 31. |
|
0 |
Ritter 154, 24 I |
| GRD01XZS0 |
Migmatitic Gneiss
|
Large well-foliated sample displaying alternating schistose and gneissic layers with boudins. The dark schistose layers are mainly composed of biotite and quartz. The boudins are mainly quartz, potassium feldspar, plagioclase, and biotite. Grading to migmatite. |
|
0 |
Ritter 154, 14 B |
| GRD01Y0S0 |
Lineation
|
A slab of gneiss composed of quartz-plagioclase-biotite. Well-foliated and medium- to coarse-grained. A nice example of a lineated gneiss. |
|
1 |
Ritter 154, 14 P |
| GRD01Y1S0 |
Folds
|
Medium-sized polished sample of gniess composed of biotite-quartz-garnet (minor). Ptygmatic folds of quartz. N30E 52 dip E20 plunge. |
|
0 |
Ritter 154, 14 P |
| GRD01Y2S0 |
Non-layered Gneiss
|
Medium-sized sample of gneiss composed of quartz-potassium feldspar-biotite-garnet (trace). Poorly developed lineations. Original description: Granulite facies (?), Qtz- K-spar- Garnet- Biotite. |
New York |
0 |
Ritter 154, 24 A |
| GRD01Y3S0 |
Schist
|
Large sample of biotite-quartz schist. Very well foliated/lineated. Fine-grained. |
Canada |
0 |
Ritter 154, 14 I |
| GRD01Y4S0 |
Impure Marble
|
Coarse-grained calcite with small metallic oxide crystals; some oxides have a rust halo while others do not. Perhaps the latter is molybdenite?. See also M-59 and M-211 |
|
0 |
Ritter 154, 14 J |
| GRD01Y5S0 |
Impure Marble
|
Coarse-grained calcite with small metallic oxide crystals. Some oxides have a rust halo while others do not. Perhaps the latter is molybdenite?. See also M-58 and M-211. Original description: calcitic marble. |
New York |
0 |
Ritter 154, 14 J |
| GRD01Y6S0 |
Dolomite Marble
|
Pink-peach dolomite marble. Original description: dolomitic marble. |
New York |
0 |
Ritter 154, 14 J |
| GRD01Y7S0 |
Veins
|
Calcite/carbonate veins and pockets in green chlorite. Occasional quartz crystals. Original description: micaceous marble with calcium carbonate veins. |
California |
0 |
Ritter 154, 24 I |
| GRD01Y8S0 |
Calcite Marble
|
Fine-grained grey marble with a few thin layers of Fe-staining. Two billets. |
California |
0 |
Ritter 154, 14 J |
| GRD01Y9S0 |
Calcite Marble
|
White, medium-grained marble. Some cleavage faces visible using a hand-lense. |
|
0 |
Ritter 154, 14 J |
| GRD01YAS0 |
Calcite Marble
|
White, medium-grained marble. Some cleavage faces visible using hand-lense. See also M-385. |
|
0 |
Ritter 154, 24 E |
| GRD01YAS1 |
Calcite Marble
|
White, medium-grained marble. Some cleavage faces visible using hand-lense. See also M-385. |
|
0 |
Ritter 154, 24 E |
| GRD01YAS2 |
Calcite Marble
|
White, medium-grained marble. Some cleavage faces visible using hand-lense. See also M-385. |
|
0 |
Ritter 154, 24 E |
| GRD01YBS0 |
Grainstone
|
Chocolate Tennessee marble. Holston Formation. Brown, coarse-grained marble. Encrinal |
Tennessee |
1 |
Ritter 154, 21 H |
| GRD01YCS0 |
Dolomite Marble
|
Mottled red-pink, fine-grained dolomite marble. One clear vein crosses the sample. Billet. |
|
0 |
Ritter 154, 24 E |
| GRD01YDS0 |
Impure Marble
|
Large slabby, fine-grained, foliated sample. Perhaps some relict bedding (low-grade metamorphism). Possibly from an impure limestone (marl?). Mylonite?. Original label: Penn Limestone. |
California |
0 |
Ritter 154, 14 J |
| GRD01YES0 |
Folds
|
Folded grey and white marble. Possibly relict folded bedding (?) from an impure limestone. Carbonate-biotite (black specks and layers). |
California |
1 |
Ritter 154, 14 P |
| GRD01YFS0 |
Calcite Marble
|
Coarse-grained layers of white, grey, and pink calcite. Grey layers contain small metallic flecks. Pink layers are pink due to staining. |
|
0 |
Ritter 154, 14 J |
