Tectonic Unit: MTrS
         Name: Sheenjek
 
  Description: upper Paleozoic to Triassic (?) radiolarian chert
               and varicoloured argillite overlying thin basinal
               Mississippian limestone; all cut by gabbro and
               diabase sills; marine
 
    Formation: Foreland Belt
                  Sheenjek Terrane
                       M     basinal limestone,
                       uP-Tr radiolarian chert, argillite and
                       M     gabbro
 
    Age Range: Carboniferous - Jurassic
  Maximum Age: 362.5 Ma
  Minimum Age: 145.6 Ma