Sample identification | ||
---|---|---|
Record ID | 2228 | |
Sample ID | A33125 | |
Geographic location | ||
Quadrangle | Petersburg | |
Latitude | 56.509998 | |
Longitude | -132.053329 | |
Processing information | ||
Dating method | K-Ar | |
Comment | Rhyolite porphyry, questionable age calculation | |
Reference | Douglass et al, 1989 | |
Sample characteristics | ||
Rock type | porphyry | |
Mineral dated | muscovite | |
Analytic result | ||
Age (my) | 15 |