Terrane Unit : DY
             Name : Dorsey

      Description : Carboniferous marginal basin chert and clastics   
                    with similar lithology to Slide Mountain Terrane  
                    but lacking ultramafics, containing less volcanics 
                    and including important conglomeratic units. 
                    Aamalgamated by latest Triassic time and  
                    accreted to Ancestral North America in the        
                    Jurassic  May represent a facies of either          
                    Quesnellia or Slide Mountain Terrane              

      Assemblages : CD Dorsey                                         

   Plutonic Rocks : None                                              
   
         Age Range: Carboniferous
       Maximum Age: 362.0 Ma
       Minimum Age: 290.0 Ma