Western Interior  search
BTNorth America
 .Western Interior
NTWestern Interior Seaway
RTCanada
 United States
 Idaho
 Utah
 Wyoming
 Montana
 Dakota Aquifer
SNTremendous region in North America including the Great Plains, the Rocky Mountains, the Basin and Range Province of the U. S., and the interior plateaus of Canada. Indexed with countries as applicable.
Western Interior Seaway  search
BTNorth America
 .Western Interior
 ..Western Interior Seaway
RTAlberta
 Canada
 United States
 Idaho
 Utah
 Wyoming
 Montana
 North American Cordillera
 British Columbia
 Canadian Cordillera
SNIndexed with countries, states and/or provinces as applicable. Added to Thesaurus in 1989.