Tectonic Unit: CI
         Name: Iyoukeen
 
  Description: limestone with chert nodules, minor shale and
               gypsum; marine
 
    Formation: Insular Belt
                  Craig Subterrane of Alexander Terrane
                       CP   Klawak
                       C    Ladrones, Peratrovich, Iyoukeen, Saginaw Bay
               Coast Belt
                  Stikine and Alexander Terranes
                       P    Dunira
                       M    Ducie
 
    Age Range: Carboniferous
  Maximum Age: 362.5 Ma
  Minimum Age: 290.0 Ma