Swan Hills Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Swan Hills Formation
RTMiddle Devonian
 Upper Devonian
 Alberta
 Saskatchewan
 Beaverhill Lake Group
 Northwest Territories
SNMiddle-Upper Devonian. Alberta, Northwest Territories, and Saskatchewan. Petroleum-bearing layer. Indexed with ages as applicable. Added to Thesaurus in 1993.