this Sevier-age synorogenic sediment has occurred. See also Basin and range topography Geology of the Rocky Mountains References Orogenies of North America Cretaceous North America Eocene North America Paleocene North America Cretaceous orogenies Paleogene orogenies Eocene geology Paleocene geology Cretaceous British Columbia Cretaceous Colorado Cretaceous Montana Cretaceous geology of Utah Cretaceous geology of Wyoming Paleogene British Columbia Paleogene Colorado Paleogene Montana Paleogene geology of Utah Paleogene geology of Wyoming