Tectonic Unit: TrJSCA
         Name: Spray River
 
  Description: Jurassic shale, organic-rich paper shale,
               sandstone, phosphatic and cherty limestone;
               Triassic shoaling-upward marine siltsone,
               sandstone, limestone, dolostone, collapse breccia,
               rare gypsum; marine
 
    Formation: Omineca Belt
                  Cariboo Subterrane of Cassiar Terrane
                       uTr  E. of Prince George, B.C.
 
    Age Range: Triassic - Jurassic
  Maximum Age: 245.0 Ma
  Minimum Age: 145.6 Ma