Tectonic Unit: NTA
         Name: Alert Bay
 
  Description: calc-alkaline and more alkaline
               basalt-andesite-dacite-rhyolite suites; nonmarine
 
    Formation: Insular Belt
                  MPT  Alert Bay
 
    Age Range: Neogene
  Maximum Age: 23.3 Ma
  Minimum Age:  1.6 Ma