Sample 78W208
NavDat sample number 7750 · TUFF
Sample
| Sample ID | 78W208 |
|---|---|
| Rock name | TUFF |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Collected by | R.H. Tedford and T. Galusha |
| Comment | pale-gray lenticular vitric tuff |
Location
| Latitude | 32.6769 |
|---|---|
| Longitude | -109.488 |
| Location | Graham County |
| State / province | Arizona |
| Location comment | elevation 3400 ft, W side of Dry Mountain, 4.7 km SSW of 111 Ranch |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 2.17 | 1.78 | 2.56 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 69.2 | WT% | COL OR AAS | |
| AL2O3 | 13.1 | WT% | COL OR AAS | |
| FE2O3 | 1.5 | WT% | COL OR AAS | |
| MGO | 0.25 | WT% | COL OR AAS | |
| CAO | 1.1 | WT% | COL OR AAS | |
| NA2O | 4.2 | WT% | COL OR AAS | |
| K2O | 3.4 | WT% | COL OR AAS | |
| TIO2 | 0.27 | WT% | COL OR AAS | |
| MN | 0.02 | PPM | COL OR AAS | |
| RB | 0.02 | PPM | COL OR AAS | |
| ZN | 0.007 | PPM | COL OR AAS |