Tectonic Unit: JHA
         Name: Hall
 
  Description: carbonaceous shale, siltstone, greywacke and
               conglomerate derived from volcanic and granitic
               rocks of Quesnellia; marine
 
    Formation: Intermontane Belt
                  Quesnel Terrane
                       lmJ  Ashcroft
               Omineca Belt
                  Quesnel Terrane
                       lmJ  Rossland: Hall, Nazcha
 
    Age Range: Lower and Middle Jurassic
  Maximum Age: 208.0 Ma
  Minimum Age: 157.1 Ma