Sample AR2
NavDat sample number 54536 · TUFF
Sample
| Sample ID | AR2 |
|---|---|
| Rock name | TUFF |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | American River, California, lower phase about 60 m thick. AR2 overlying the Nine Hill Tuff, is a hornblende-bearing tuff identical in chemistry to TC1 and TC3. |
Location
| Latitude | 38.6986 |
|---|---|
| Longitude | -120.177 |
| State / province | California |
| Location comment | Nine Hill Tuff |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 28.72 | 26.34 | 31.1 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 67.02 | WT% | XRF | |
| TIO2 | 0.51 | WT% | XRF | |
| AL2O3 | 14.96 | WT% | XRF | |
| FEO | 2.42 | WT% | XRF | |
| MNO | 0.06 | WT% | XRF | |
| MGO | 0.48 | WT% | XRF | |
| CAO | 1.75 | WT% | XRF | |
| NA2O | 3.13 | WT% | XRF | |
| K2O | 5.44 | WT% | XRF | |
| P2O5 | -0.08 | WT% | XRF | |
| S | 40 | PPM | XRF | |
| CL | 474 | PPM | XRF | |
| ZN | 73 | PPM | XRF | |
| GA | 19 | PPM | XRF | |
| RB | 184 | PPM | XRF | |
| SR | 324 | PPM | XRF | |
| Y | 40 | PPM | XRF | |
| ZR | 327 | PPM | XRF | |
| NB | 22 | PPM | XRF | |
| CS | -5 | PPM | XRF | |
| BA | 1915 | PPM | XRF | |
| PB | 36 | PPM | XRF | |
| TH | 16 | PPM | XRF | |
| LA | 56 | PPM | XRF | |
| CE | 102 | PPM | XRF | |
| PR | 14 | PPM | XRF | |
| ND | 35 | PPM | XRF | |
| SM | -8 | PPM | XRF |