Tectonic Unit: uPWRP
         Name: Rapitan

  Description: Rapitan: upper tillite, hematite-jaspilite iron   
               formation, silicic turbidite and red, maroon and  
               green argillite, lower tillite; local tholeiite   
               above clac-alkaline basalt and minor felsite;     
               Toby: andesite flows and tuffs above diamictite   
               and conglomerate; marine                          

    Formation: Foreland Belt  
                  Porcupine Terrane 
                     unnamed volcanics in E. Alaska, N. of Tintina fault 

    Age Range: Upper Proterozoic
  Maximum Age: 1000.0 Ma
  Minimum Age:  570.0 Ma