Tectonic Unit: PKT
         Name: undivided Taku
 
  Description: carbonaceous shale, mudstone, greywacke and lesser
               limestone, chert and conglomerate; andesitic and
               basaltic and minor felsic volcanics; and
               metamorphic equivalents.  Carbonaceous slate and
               limestone associated with volcanics have yielded
               Middle to Late Triassic fossils (PKTTr); crinoidal
               limestone contains Permian fossils (PKTP);
               greywacke and conglomerate probably belong to the
               Gravina-Nutzotin (Gambier) assemblage; marine
 
    Formation: Insular Belt
                  Taku Terrane
                       PKT  Taku
 
    Age Range: Upper Triassic
  Maximum Age: 235.0 Ma
  Minimum Age: 208.0 Ma