Sample Type is Igneous › Volcanic › Intermediate Extrusive
133 records | Download| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD02QUS0 | Dacite | Very fresh phenocrysts. Plag-euhedral, Quartz is rounded. | California | 1 | Ritter 154, 15 Q |
| GRD02QVS0 | Andesite | Plag-hornblend phyric andesite | California | 1 | Ritter 154, 16 B |
| GRD02QWS0 | Andesite | Plag porphorite Andesites | 5 Lakes Trail at road to Alpine Meadows ski area Rte 89 | 1 | Ritter 154, 16 B |
| GRD02QZS0 | Dacite | California | 1 | Ritter 154, 29 D | |
| GRD02RVS0 | Dacite | Morro Rock. Zoned Plagioclase(approx 0.5 cm), Biotite, Quartz rich groundmass. Moderately altered | Dacite Porphyry, Morro Bay, San Luis Obispo | 3 | Ritter 154, 3 E |
| GRD02RVS1 | Dacite | Morro Rock. Zoned Plagioclase(approx 0.5 cm), Biotite, Quartz rich groundmass. Moderately altered | California | 3 | Ritter 154, 15 Q |
| GRD02TFS0 | Dacite | Zoned Plagioclase phenocrysts. Avalanche deposit, devastated area. Collected 9/20/99 | California | 1 | Ritter 154, 29 D |
| GRD02THS0 | Intermediate Extrusive | Sonora Pass lavas, GPS locations 8/15/00 | California | 1 | Ritter 154, 29 C |
| GRD02TQS0 | Intermediate Extrusive | Avalanche deposit. Andesite/Dacite. Collected 9/20/99 | California | 1 | Ritter 154, 29 D |
| GRD02U3S0 | Andesite | Plag rich Andesite dike cutting Sailor Creek formation (lower-mid J) | California | 1 | Ritter 154, 16 A |
| GRD02U8S0 | Dacite | Rhyolite/Dacite Avalanche deposit 9/20/99 | California | 1 | Ritter 154, 29 D |
| GRD02UBS0 | Intermediate Extrusive | Franciscan Melange. Keratophyre? Fine grain with plag rich veins | California | 2 | Ritter 154, 15 H |
| GRD02V9S0 | Andesite | Porphyritic Andesite. See SR 78a | California | 0 | Camp Elliott |
| GRD02VRS0 | Dacite | Dense - sheared, epidote(?) | California | 0 | Camp Elliott |
| GRD02WDS0 | Dacite | California | 1 | Ritter 154, 29 C | |
| GRD02WGS0 | Andesite | Good thin section. Unremarkable hand sample. Plagioclase rich | California | 1 | Ritter 154, 29 C |
| GRD02WHS0 | Intermediate Extrusive | Hornblende Andesite/Dacite (Hypabyssal). Collected 8/10/60 | California | 1 | Ritter 154, 15 Q |
| GRD02WJS0 | Andesite | Gray/green andesite/vitrophyre with quartz and feldspar phenocrysts | California | 1 | Ritter 154, 16 A |
| GRD02X9S0 | Andesite | Basaltic Andesite | California | 2 | Ritter 154, 16 G |
| GRD02X9S1 | Andesite | Basaltic Andesite | California | 2 | Camp Elliott |
| GRD02XOS0 | Intermediate Extrusive | Plagioclase-phyric intermediate extrusive with glassy inclusions | California | 0 | Ritter 154, 16 B |
| GRD041SS0 | Dacite | Puerto Rico | 0 | Ritter 154, 29 L | |
| GRD041WS0 | Andesite | Andesite | Puerto Rico | 0 | Ritter 154, 29 L |
| GRD0429S0 | Intermediate Extrusive | Quartz keratophyre | Puerto Rico | 0 | Ritter 154, 29 L |
| GRD0430S0 | Andesite | Plagioclase and Pyroxene bearing andesite. | Mexico | 2 | Ritter 154, 16 A |
| GRD0433S0 | Andesite | Hornblende Diorite Porphyry. Bull Mountain Bysmalith. Dynamited boulder from roadside | Utah | 2 | Ritter 154, 16 B |
| GRD0434S0 | Andesite | Hornblende Diorite Porphyry. Large euhedral hornblende. Float, Bull Creek. | Utah | 4 | Ritter 154, 3 D |
| GRD043AS0 | Andesite | Hornblende Andesite Porphyry | France | 0 | Ritter 154, 20 C |
| GRD043AS1 | Andesite | Hornblende Andesite Porphyry | France | 0 | Ritter 154, 20 C |
| GRD0447S0 | Andesite | sparsely phyric andesite? from Ossippee Mtn complex | New Hampshire | 0 | Ritter 154, 29 E |