| GRD02ALS0 |
Amphibolite
|
Fine-grained pyroxene/amphibole-plagioclase. Original label: fine-grained gneiss. |
California |
0 |
Ritter 154, 14 G |
| GRD02AMS0 |
Quartzofeldspathic
|
Metavolcanic. Fine-grained amphibole-quartz-plagioclase (trace). Fe-hydroxide stains. Original label: Meta-volcanic. Jur-Cret. |
California |
1 |
Ritter 154, 14 H |
| GRD02ANS0 |
Mafic
|
Ilmenite-Garnet-Olivine-Plagioclase (minor). Original label: Skarn. |
New York |
0 |
Ritter 154, 14 H |
| GRD02AOS0 |
Porphyroblasts
|
Tremolite-biotite-muscovite schist to gneiss. Large books of biotite (porphyroblasts) in the schist. Tremolite-quartz boudins in gneiss. Original label: Hornblende-carbonate. |
|
1 |
Ritter 154, 14 O |
| GRD02APS0 |
Relict Textures
|
Metavolcanic. Chlorite-quartz-hematite-pyrite (trace). Slightly foliated. Medium-grained quartz porphyroblasts and fine-grained quartz stringers. |
|
0 |
Ritter 154, 24 H |
| GRD02B0S0 |
Quartzofeldspathic
|
Plagioclase-amphibole. Medium-grained. |
|
0 |
Ritter 154, 24 F |
| GRD02B2S0 |
Mafic
|
Metagabbro. Medium-grained plagioclase-amphibole-phlogopite (trace)-pyrite (trace). |
|
0 |
Ritter 154, 14 H |
| GRD02B5S0 |
Granulite
|
Fine-grained quartz-plagioclase-opaques-clinopyroxene granulite. |
|
1 |
Ritter 154, 14 N |
| GRD02B9S0 |
Reaction Textures
|
Feldspar-garnet-phlogopite-pyrite (trace). Brown relict garnets. Retrograde metamorphism? |
|
1 |
Ritter 154, 14 O |
| GRD02BAS0 |
Dolomite Marble
|
Coarse-grained, white dolomite marble. |
California |
0 |
Ritter 154, 14 J |
| GRD02BRS0 |
Non-layered Gneiss
|
Quartz-muscovite-biotite gniess. Poorly developed lineations of biotite. |
Alpine |
2 |
Ritter 154, 24 A |
| GRD02BSS0 |
Folds
|
Fine-grained muscovite schist. Slight folds and crenulations. Slickensides? |
Alps |
0 |
Ritter 154, 14 P |
| GRD02BTS0 |
Amphibolite
|
Abundant dark green amphibole with white interstitial mineral. Slight foliation. |
|
2 |
Ritter 154, 14 G |
| GRD02BUS0 |
Calcsilicate (Skarn)
|
Large calcite crystals with nice cleavage. Small dark and light green pyroxene crystals. |
|
1 |
Ritter 154, 14 K |
| GRD02BVS0 |
Phyllite
|
Chlorite phyllite. Black veinlet. Original description: metagreywacke. |
California |
1 |
Ritter 154, 14 E |
| GRD02BWS0 |
Folds
|
S-folded gneiss. Phlogopite-biotite-quartz-pyrite (trace). Original description: folded phologopite gneiss. |
|
0 |
Ritter 154, 14 P |
| GRD02BXS0 |
Folds
|
Fine-grained gneiss with ptygmatic folds. Very nice example of folds. |
|
0 |
Ritter 154, 14 P |
| 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 |
| GRD02C0S0 |
Quartzofeldspathic
|
Hornblende-quartz-phologopite. Original label: Grenville Quartzite. |
New York |
0 |
Ritter 154, 24 F |
| GRD02C2S0 |
Calcsilicate (Skarn)
|
Large, beautiful sample. Epidote-potassium feldspar-calcite. Original label: Museum quality epidote. |
Unknown |
0 |
Ritter 154, 14 K |
| GRD02C3S0 |
Relict Textures
|
Rounded schist and smaller angular black flecks in a very fine-grained greenish/black silicic matrix. Original label: pseudo-tachylite. |
Switzerland |
0 |
Ritter 154, 24 H |
| GRD02C4S0 |
Quartzite
|
Small, unremarkable sample of quartzite. Faint bedding. Light grey. Not cut. |
France |
0 |
Camp Elliott |
| GRD02E4S0 |
Serpentinite
|
Serpentinite. Contains magnetite. Billet. Probably from Ligurian ophiolite. |
Italy |
1 |
Ritter 154, 14 M |
| GRD02EDS0 |
Calcite Marble
|
Grey coarse-grained marble. Very nice crystals. |
California |
0 |
Ritter 154, 14 J |
| GRD02EDS1 |
Calcite Marble
|
Grey and white coarse-grained marble. Very nice crystals. |
California |
0 |
Ritter 154, 24 E |
| GRD02EES0 |
Folds
|
Folded carbonate. Some layers are visible, one of which contains a small amount of mica. |
|
0 |
Ritter 154, 24 I |
| GRD02EFS0 |
Granulite
|
Quartz-biotite-garnet. Garnet porphyroblasts. |
|
0 |
Ritter 154, 24 E |
| GRD02EFS1 |
Granulite
|
Quartz-biotite-garnet. Garnet porphyroblasts. |
|
0 |
Ritter 154, 14 N |
| GRD02EGS0 |
Phyllite
|
Slab of black phyllite. Perfect slaty cleavage. Books of mica at oblique angles to cleavage. |
|
0 |
Ritter 154, 14 E |
