| GRD0092S0 |
Trachyte
|
soda, TSB only |
Mexico |
0 |
Camp Elliott |
| GRD0093S0 |
Trachyte
|
TSB only |
Mexico |
0 |
Camp Elliott |
| GRD0094S0 |
Rhyolite
|
soda |
Mexico |
0 |
Camp Elliott |
| GRD0097S0 |
Trachyte
|
|
Italy |
0 |
Camp Elliott |
| GRD00A9S0 |
Obsidian
|
Likely from Mount Ourito Flow on Easter Island (rhyolite flow). |
Chile |
0 |
Camp Elliott |
| GRD00AGS0 |
Rhyolite
|
Pantellerite (soda rhyolite). Very small sample. |
Italy |
0 |
Camp Elliott |
| GRD00AHS0 |
Trachyte
|
Pantelleritic. Small hand sample. |
Italy |
0 |
Camp Elliott |
| GRD00ANS0 |
Obsidian
|
A local example of obsidian. |
California |
0 |
Ritter 154, 15 M |
| GRD00APS0 |
Rhyolite
|
inclusion in I-410; Quartz-K-spar(?)- amphibole |
California |
0 |
Camp Elliott |
| GRD00BFS0 |
Rhyolite
|
TSB only |
Colorado |
0 |
Camp Elliott |
| GRD00BKS0 |
Rhyolite
|
|
Colorado |
0 |
Camp Elliott |
| GRD00BMS0 |
Rhyolite
|
TSB only |
Colorado |
0 |
Camp Elliott |
| GRD00BZS0 |
Latite
|
Acmite bearing neph syenite dike. Samples 474-500 taken from Rwanda and Burundi (East African Rift) |
Rwanda |
0 |
Camp Elliott |
| GRD00CDS0 |
Trachyte
|
Biotite phenocrysts. Samples 474-500 taken from Rwanda and Burundi (East African Rift) |
Rwanda |
0 |
Ritter 154, 15 H |
| GRD00CES0 |
Trachyte
|
Biotite and Plag phenorcrysts. Samples 474-500 taken from Rwanda and Burundi (East African Rift) |
Rwanda |
0 |
Ritter 154, 15 H |
| GRD00CFS0 |
Latite
|
Hypersthene-latite with tridymite (High Temperature Qtz.) Crystals in vugs. Samples 474-500 taken from Rwanda and Burundi (East African Rift) |
Rwanda |
0 |
Ritter 154, 15 H |
| GRD00CGS0 |
Latite
|
Hypersthene-latite with tridymite (High Temperature Qtz.) Samples 474-500 taken from Rwanda and Burundi (East African Rift) |
Rwanda |
0 |
Ritter 154, 15 H |
| GRD00CXS0 |
Trachyte
|
Original description: Soda trachyte. Samples I-501 to I-510 taken from Congo Tanganikia province |
Congo {Democratic Rep} |
0 |
Ritter 154, 15 H |
| GRD00CYS0 |
Trachyte
|
Original description: Q-anorthoclase trachyte (Q-Amph-green Px). Samples 511-519 from Ascension Island. |
United Kingdom |
0 |
Ritter 154, 15 H |
| GRD00D1S0 |
Rhyolite
|
Small sample. Original description: Soda comendite (peralkaline rhyolite). Samples 511-519 from Ascension Island. |
United Kingdom |
0 |
Camp Elliott |
| GRD00D5S0 |
Trachyte
|
Original description: Aegirine trachyte. |
United Kingdom |
0 |
|
| GRD00D6S0 |
Obsidian
|
Small sample. Samples 511-519 from Ascension Island. |
United Kingdom |
0 |
Camp Elliott |
| GRD00DBS0 |
Rhyolite
|
Small sample. Original description: Q porphyry. |
South Africa |
0 |
Camp Elliott |
| GRD00E1S0 |
Trachyte
|
Trachyte porphyry associated with Tulameen BC ultramafic complex (likely Late Triassic). |
Canada |
0 |
Ritter 154, 15 H |
| GRD00GBS0 |
Rhyolite
|
Very altered rhyolite from 595 Ma Lynn-Mattapan volcanic complex. Thin section in Wards Micro Slides box in Ritter 154. |
Massachusetts |
1 |
Camp Elliott |
| GRD00GCS0 |
Rhyolite
|
Rhyolite with flow bands. Minerals include topaz, spessartine, quartz, sanidine. |
Colorado |
1 |
Ritter 154, 15 G |
| GRD00GFS0 |
Rhyolite
|
altered black porphyritic rhyolite. Part of Marblehead Neck volcanic plug (dark fine grained rhyolite and lighter volcanic breccias) |
Massachusetts |
1 |
Ritter 154, 15 G |
| GRD00GJS0 |
Trachyte
|
trachyte (Ks-Plag-Bi), 2 large hand samples. |
Colorado |
0 |
Ritter 154, 15 H |
| GRD00GYS0 |
Rhyolite
|
rhyolite porphyry (Ks>Pl, Hb, Q). Porphyritic rhyolite, with K-spar and phenocrysts |
|
0 |
Ritter 154, 15 G |
| GRD00HMS0 |
Obsidian
|
altered obsidian with Q |
|
0 |
Camp Elliott |
