Terrane Unit: AA
              Name: Arctic Alaska

       Description: Upper Proterozoic and lower Paleozoic miogeoclinal
                    sedimentary, volcanic and granitic rocks          
                    uncomformably overlain by Lower Carboniferous to  
                    Triassic continental margin deposits and displaced
                    along the Kaltag Fault.  
                    Geological record, except for displaced continental
                    margin, differs from that of Ancestral North 
                    America                          

       Assemblages: uPPzN Neruokpuk, PCHA Hyland, CDRA Rocky Mountains,
                    DMIA Imperial, CMEA Endicott Gp. of Mattson       
                    Assemblage, CLA Lisburne, PTrS Sadlerochit, JKPA   
                    Parsons                                           

    Plutonic Rocks: DMqA Ammerman, DMqF Fitton, DMqOc Old Crow, DMqSh 
                    Schaeffer, DMqSe Sedgwick 

         Age Range: Upper Proterozoic - Lower Cretaceous                       
       Maximum Age: 1000.0 Ma
       Minimum Age:   97.0 Ma