Sample Type is Igneous › Volcanic › Intermediate Extrusive
133 records | Download| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD006LS0 | Andesite | pyroxene, plag, hornblende phenocrysts | California | 0 | Ritter 154, 16 A |
| GRD006QS0 | Andesite | Mt. Pelee 1902 Avalanche deposit. Could be block from block and ash flow. Original description: Hypersthene, vitrophyre tuff. | Mt. Pelee, Martinique, Antilles | 0 | Ritter 154, 16 A |
| GRD006RS0 | Andesite | Mt. Pelee 1902 dome | Mt. Pelee, Martinique, Antilles | 0 | Ritter 154, 16 A |
| GRD006SS0 | Andesite | andesite with inclusions, from Mt. Pelee 1902 dome | Mt. Pelee, Martinique, Antilles | 0 | Ritter 154, 16 B |
| GRD006TS0 | Andesite | 1930 dome | Mt. Pelee, Martinique, Antilles | 0 | Ritter 154, 16 B |
| GRD006US0 | Andesite | Fresh sample with large euhedral doubly terminated hypersthene crystals. | Mt. Pelee, Martinique, Antilles | 0 | Ritter 154, 16 B |
| GRD006VS0 | Andesite | France | 0 | Ritter 154, 16 B | |
| GRD006XS0 | Andesite | Original description: Hypersthene-hornblende andesite. | Martinique, Antilles | 0 | Ritter 154, 19 H |
| GRD006YS0 | Andesite | Very fine-grained with olivine and pyroxene | Saint Vincent & the Grenadines | 0 | Ritter 154, 19 H |
| GRD0070S0 | Dacite | Hb-Plag-Bi(Phlog) Two samples with same number that may be related. Dacite and Granodiorite. One is pumiceous while the other is more crystal-rich. | California | 0 | Ritter 154, 15 Q |
| GRD0071S0 | Dacite | Hornblende dacite with inclusions. | California | 0 | Ritter 154, 15 Q |
| GRD0072S0 | Dacite | Hb dacite with inclusions | California | 0 | Ritter 154, 15 Q |
| GRD0073S0 | Andesite | Fine-grained with microphenocrysts of plag and pyroxene. | California | 0 | Ritter 154, 16 B |
| GRD0074S0 | Dacite | Pre-Lassen dacite with hornblende and biotite. | California | 0 | Ritter 154, 15 Q |
| GRD0075S0 | Andesite | Brokeoff andesite | California | 0 | Ritter 154, 19 H |
| GRD0076S0 | Andesite | Brokeoff andesite | California | 0 | Ritter 154, 19 H |
| GRD0077S0 | Andesite | 1915 lava, TSB only | California | 0 | Ritter 154, 19 H |
| GRD0078S0 | Dacite | With inclusions. Nice small Hb. Pre-1915 Lassen dacite. | California | 0 | Camp Elliott |
| GRD0079S0 | Andesite | Inclusions. TSB only. | California | 0 | Ritter 154, 19 H |
| GRD007AS0 | Andesite | California | 0 | Ritter 154, 19 H | |
| GRD007BS0 | Andesite | California | 0 | Ritter 154, 19 I | |
| GRD007CS0 | Dacite | 2 small hand samples. | California | 0 | Camp Elliott |
| GRD007ES0 | Andesite | California | 0 | Ritter 154, 19 H | |
| GRD007FS0 | Andesite | Hornblende | California | 0 | Ritter 154, 16 B |
| GRD007IS0 | Andesite | California | 0 | Ritter 154, 19 H | |
| GRD007KS0 | Dacite | East flow, Glass Mountain, Obsidian | California | 0 | Camp Elliott |
| GRD007LS0 | Dacite | Inclusion in I-283. Two small hand samples. | California | 0 | Camp Elliott |
| GRD007MS0 | Dacite | Medicine Flow. Small hand sample. | California | 0 | Camp Elliott |
| GRD007NS0 | Andesite | Oregon | 0 | Ritter 154, 16 B | |
| GRD007OS0 | Andesite | crystal-rich | Oregon | 0 | Ritter 154, 16 B |