Tectonic Unit: JKR
         Name: Relay Mountain
 
  Description: shale and siltstone in central Tyaughton Trough; greywacke and
               conglomerate at trough margins; derived in part from volcanic
               terranes to the east; marine
 
    Formation: Coast Belt
                  Cadwallader Terrane
                       mJlK   Relay Mtn.
                  Methow Terrane
                       mJlk   Relay Mtn.
                       uJ     Thunder L.

    Age Range: Upper Jurassic - Lower Cretaceous
  Maximum Age: 157.1 Ma
  Minimum Age:  97.0 Ma