| GRD0001S0 |
Obsidian
|
Black, conchoidal fracture. Grey band. |
California |
2 |
Ritter 154, 15 M |
| GRD0003S0 |
Obsidian
|
|
California |
1 |
Ritter 154, 15 M |
| GRD0005S0 |
Obsidian
|
|
|
1 |
Ritter 154, 19 F |
| GRD000DS0 |
Rhyolite
|
Pink. Quartz and K-spar rich. Original description: Miarolitic rhyolite porphyry. |
|
1 |
Ritter 154, 15 G |
| GRD000GS0 |
Obsidian
|
Spherulitic Obsidian |
California |
1 |
Ritter 154, 15 M |
| GRD000HS0 |
Andesite
|
Amygduloidal basaltic andesite |
California |
0 |
Camp Elliott |
| GRD000RS0 |
Rhyolite
|
Original label: Rhyolite porphyry. |
Missouri |
1 |
Ritter 154, 15 F |
| GRD000TS0 |
Rhyolite
|
pink rhyolite with Q-Hb-Plag phenocrysts |
California |
0 |
Ritter 154, 15 F |
| GRD000US0 |
Dacite
|
fairly altered |
California |
1 |
Ritter 154, 15 Q |
| GRD000VS0 |
Andesite
|
Porphyritic. White sanidine in dark grey matrix. |
California |
1 |
Ritter 154, 16 A |
| GRD000WS0 |
Dacite
|
|
California |
1 |
Ritter 154, 15 Q |
| GRD000XS0 |
Rhyolite
|
|
California |
1 |
Ritter 154, 15 F |
| GRD000ZS0 |
Rhyolite
|
Rhyolite tuff with large pumice fragment in hand sample. Original label: Rhyolite tuff with Plag-Q phenos-pumice-lithics. |
California |
0 |
Ritter 154, 15 F |
| GRD0010S0 |
Rhyolite
|
|
California |
1 |
Ritter 154, 15 F |
| GRD0011S0 |
Rhyolite
|
Original label: Rhyolite with minor blue zoisite. |
California |
1 |
Ritter 154, 15 F |
| GRD0012S0 |
Andesite
|
Plagioclase and hornblende in glassy matrix |
California |
1 |
Ritter 154, 16 B |
| GRD0013S0 |
Andesite
|
|
California |
1 |
Ritter 154, 16 A |
| GRD001AS0 |
Rhyolite
|
Red with quartz crystals |
California |
0 |
Ritter 154, 15 F |
| GRD001ES0 |
Basalt
|
|
California |
1 |
Ritter 154, 16 G |
| GRD001GS0 |
Rhyolite
|
Thin section only. Thin Section is in Thin Section only case in RH 154. |
|
1 |
Ritter 154 |
| GRD001IS0 |
Basalt
|
Fresh sample |
California |
1 |
Ritter 154, 16 G |
| GRD001JS0 |
Rhyolite
|
quartz phenocrysts |
California |
0 |
Ritter 154, 15 F |
| GRD001MS0 |
Basalt
|
Plagioclase laths |
California |
1 |
Ritter 154, 16 G |
| GRD001PS0 |
Basalt
|
Thin section only. Thin section is in the Thin Section Only case in RH154. |
California |
1 |
Ritter 154 |
| GRD001RS0 |
Basalt
|
|
California |
1 |
Ritter 154, 16 G |
| GRD001VS0 |
Rhyolite
|
Thin sections look very different from one another. |
California |
2 |
Ritter 154, 15 F |
| GRD001WS0 |
Basalt
|
Small, greenish sample. |
California |
1 |
Ritter 154, 16 G |
| GRD001ZS0 |
Rhyolite
|
Groundmass is glassy. Feldspars in hand sample. |
California |
1 |
Ritter 154, 15 F |
| GRD0020S0 |
Rhyolite
|
|
California |
1 |
Ritter 154, 15 F |
| GRD0021S0 |
Basalt
|
Red |
California |
1 |
Ritter 154, 16 G |
