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Sample 21-103
NavDat sample number 11071 · TRACHYTE
Sample
| Sample ID | 21-103 |
|---|
| 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 | 44.4755 |
|---|
| Longitude | -104.427 |
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| Location | Bear Lodge Mountains |
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| State / province | Wyoming |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 44 |
|
38 |
50 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 54.97 | | WT% | XRF |
| AL2O3 | 15.39 | | WT% | XRF |
| FE2O3T | 6.96 | | WT% | XRF |
| MGO | 3.07 | | WT% | XRF |
| CAO | 6.23 | | WT% | XRF |
| NA2O | 4.02 | | WT% | XRF |
| K2O | 4.57 | | WT% | XRF |
| TIO2 | 1.02 | | WT% | XRF |
| P2O5 | 0.56 | | WT% | XRF |
| MNO | 0.16 | | WT% | XRF |
| TOTAL | 96.95 | | WT% | XRF |
