| 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 |
| 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 |
| 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 |
| GRD001AS0 |
Rhyolite
|
Red with quartz crystals |
California |
0 |
Ritter 154, 15 F |
| GRD001GS0 |
Rhyolite
|
Thin section only. Thin Section is in Thin Section only case in RH 154. |
|
1 |
Ritter 154 |
| GRD001JS0 |
Rhyolite
|
quartz phenocrysts |
California |
0 |
Ritter 154, 15 F |
| GRD001VS0 |
Rhyolite
|
Thin sections look very different from one another. |
California |
2 |
Ritter 154, 15 F |
| GRD001ZS0 |
Rhyolite
|
Groundmass is glassy. Feldspars in hand sample. |
California |
1 |
Ritter 154, 15 F |
| GRD0020S0 |
Rhyolite
|
|
California |
1 |
Ritter 154, 15 F |
| GRD0025S0 |
Rhyolite
|
|
|
1 |
Ritter 154, 15 F |
| GRD002AS0 |
Rhyolite
|
|
California |
1 |
Ritter 154, 15 F |
| GRD002DS0 |
Rhyolite
|
|
California |
1 |
Ritter 154, 15 F |
| GRD002GS0 |
Trachyte
|
Bi Trachyte, small hand sample |
France |
0 |
Camp Elliott |
| GRD003QS0 |
Obsidian
|
Nice conchoidal fracture |
Arizona |
0 |
Camp Elliott |
| GRD005TS0 |
Trachyte
|
|
Hawaii |
0 |
Camp Elliott |
| GRD005US0 |
Trachyte
|
|
Hawaii |
0 |
Camp Elliott |
| GRD006MS0 |
Rhyolite
|
Vitrophyric dome. Multiple small samples. |
California |
1 |
Ritter 154, 15 F |
| GRD006OS0 |
Rhyolite
|
Glassy rhyolite from dome. |
California |
0 |
Ritter 154, 15 F |
| GRD006PS0 |
Rhyolite
|
glassy |
California |
0 |
Camp Elliott |
| GRD007WS0 |
Rhyolite
|
|
Oregon |
0 |
Camp Elliott |
| GRD008KS0 |
Rhyolite
|
|
Utah |
0 |
Ritter 154, 15 F |
| GRD008LS0 |
Rhyolite
|
Small piece (TSB only). Fine- grained rhyolite with Kspar and smoky quartz. Original label: Nevadite (type locality). Quartz-filled vesicles. |
Utah |
0 |
Ritter 154, 15 F |
