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Sample 34-261
NavDat sample number 11075 · TRACHYTE
Sample
| Sample ID | 34-261 |
|---|
| Rock name | TRACHYTE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | phenocrysts of plagioclase, sanidine, salite, hastingsite; aphanitic to fine grained groundmass of sanidine microlites and cryptocrystalline albite, oligoclase, anorthoclase, and analcime |
|---|
Location
| Latitude | 44.4561 |
|---|
| Longitude | -104.409 |
|---|
| Location | Bear Lodge Mountains |
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| State / province | Wyoming |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 44 |
|
38 |
50 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 60.19 | | WT% | XRF |
| AL2O3 | 19.02 | | WT% | XRF |
| FE2O3T | 2.04 | | WT% | XRF |
| MGO | 0.38 | | WT% | XRF |
| CAO | 2.2 | | WT% | XRF |
| NA2O | 5.57 | | WT% | XRF |
| K2O | 5.61 | | WT% | XRF |
| TIO2 | 0.23 | | WT% | XRF |
| P2O5 | 0.05 | | WT% | XRF |
| MNO | 0.09 | | WT% | XRF |
| TOTAL | 95.38 | | WT% | XRF |
