| Sample identification | ||
|---|---|---|
| Record ID | 684 | |
| Sample ID | 77AWs122 | |
| Geographic location | ||
| Quadrangle | Chignik | |
| Latitude | 56.195 | |
| Longitude | -158.316666 | |
| Processing information | ||
| Dating method | K-Ar | |
| Comment | Minimum age, impure separate with incl. of plagioclase, mean of 2 determinations | |
| Reference | Wilson, 1980, Wilson et al, 1981, Wilson and Cox, 1983 | |
| Sample characteristics | ||
| Rock type | dacite | |
| Mineral dated | hornblende | |
| Analytic result | ||
| Age (my) | 22.37 | |