| 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 |
| GRD002HS0 |
Basalt
|
Puy en Velay |
France |
0 |
Ritter 154, 20 E |
| GRD002YS0 |
Basalt
|
Pisgah basalt |
California |
0 |
Ritter 154, 16 G |
| GRD003BS0 |
Basalt
|
|
Arizona |
0 |
Ritter 154, 20 E |
| GRD003CS0 |
Basalt
|
Surface flow |
Arizona |
0 |
Camp Elliott |
| GRD003DS0 |
Basalt
|
|
Arizona |
0 |
Ritter 154, 20 E |
| GRD003FS0 |
Basalt
|
|
Arizona |
0 |
Ritter 154, 20 E |
| GRD003JS0 |
Basalt
|
|
Arizona |
0 |
Ritter 154, 20 E |
| GRD003KS0 |
Basalt
|
sill 5-10 below top |
Arizona |
0 |
Ritter 154, 20 E |
| GRD003LS0 |
Basalt
|
150-200 |
Arizona |
0 |
Ritter 154, 20 E |
| GRD003MS0 |
Basalt
|
50 |
Arizona |
0 |
Ritter 154, 20 E |
| GRD003NS0 |
Basalt
|
12 |
Arizona |
0 |
Ritter 154, 20 E |
| GRD003OS0 |
Basalt
|
3 above |
Arizona |
0 |
Ritter 154, 20 E |
| GRD003PS0 |
Basalt
|
|
Arizona |
0 |
Ritter 154, 20 E |
| GRD003QS0 |
Obsidian
|
Nice conchoidal fracture |
Arizona |
0 |
Camp Elliott |
| GRD003SS0 |
Basalt
|
|
Arizona |
0 |
Ritter 154, 20 E |
| GRD003YS0 |
Basalt
|
|
Tristan da Cunha: flow or large sill half way between Big Point and Rookery Point, elev 10 |
0 |
Ritter 154, 20 E |
| GRD003ZS0 |
Basalt
|
stretched vesicles |
Tristan da Cunha: Halfway between Rookery and Big points |
0 |
Ritter 154, 20 E |
| GRD0040S0 |
Andesite
|
Vesicular |
Tristan da Cunha: Stony Beach Cinder Cone, elev. 0 (penultimate flow) |
0 |
Ritter 154, 19 H |
| GRD0041S0 |
Andesite
|
|
Tristan da Cunha: 1961 eruption, seaward edge of flow, elev 10. 100 yards from extreme W. of flow |
0 |
Ritter 154, 16 A |
| GRD0042S0 |
Andesite
|
|
Tristan da Cunha: 1961 eruption, seaward edge of flow, elev 10, from outer part of flow |
0 |
Ritter 154, 19 H |
| GRD0043S0 |
Basalt
|
nice vesicles |
Tristan da Cunha: sealevel outcrop below the Settlement and E of Herald Pt |
0 |
Ritter 154, 20 E |
| GRD0044S0 |
Basalt
|
Fine-grained lava flow |
Tristan da Cunha: flow forming 3rd waterfall above largest waterfall, Hottentot gulch, elev 1500 |
0 |
Ritter 154, 20 E |
| GRD0045S0 |
Basalt
|
Fine grained fissile lava flow. Thin section extremely different than hand sample (wrong number?). |
Tristan da Cunha: 100 yards W of Pinnacle, Hottentot gulch, 900 elev |
1 |
Ritter 154, 20 E |
| GRD0046S0 |
Basalt
|
|
Tristan da Cunha: behind huts at Landing near the waterfall, Inaccessible Island, elev 75 |
0 |
Ritter 154, 20 E |
| GRD0047S0 |
Basalt
|
1960 Kapcho original description. Likely referring to the 1960 Kapoho eruption on Kilauea. |
Hawaii |
0 |
Ritter 154, 16 G |
| GRD0048S0 |
Basalt
|
Great Lake Dolerite Sheet |
Australia |
1 |
Ritter 154, 29 B |
