| Sample identification | ||
|---|---|---|
| Record ID | 1300 | |
| Sample ID | 68ABg553 | |
| Geographic location | ||
| Quadrangle | Ketchikan | |
| Latitude | 55.185001 | |
| Longitude | -131.578339 | |
| Processing information | ||
| Dating method | K-Ar | |
| Comment | Minimum age, Annette Island | |
| Reference | Berg et al, 1978, Berg, 1970, 1972, Irvine, 1974 | |
| Sample characteristics | ||
| Rock type | trondjemite | |
| Mineral dated | hornblende | |
| Analytic result | ||
| Age (my) | 424 | |