Tectonic Unit: JKG
         Name: Gambier
 
  Description: upper unit: Albian greywacke, siltstone,
               argillite, conglomerate with granitic clasts,
               minor rhyolite (JKGA) lower unit:
               Barremian-Hauterivian and older basal granitic
               conglomerate; clac-alkaline dacite-andesite
               fragmental volcanics, greywacke-argillite flysch;
               marine and nonmarine
 
    Formation: Insular Belt
                  JK   Gravina-Nutzotion overlap assemblage
                  lK   Chisana
                  JK   Seymour Canal, Brothers, Douglas I.
                  uJ   Gravina I.
               Coast Belt
                  lk   Dezadeash
                  JK   Gambier, Fire L., Spieden
                  lK   Helm, Cheakamus, Eurydice, Brokenback Hill,
                       Hauterivian and younger
                  JK   Peninsula, Nooksack
               Intermontane Belt
                  JK   Gambier
 
    Age Range: Upper Jurassic - Lower Cretaceous
  Maximum Age: 157.1 Ma
  Minimum Age:  97.0 Ma