Results: 1 - 4 of 4
May 31, 2007
Earth Sciences Report
… Phanerozoic are rare and the Upper Cretaceous stratigraphic studies … due to severe erosion of the Upper Cretaceous along the Peace …
Dec 31, 1965
Earth Sciences Report
… variable thickness underlain by Upper Cretaceous strata. The surficial … surface. Maximum relief on the upper surfaces of the map-units …
Dec 31, 1960
Bulletin
… basal sandstone member of the Upper Cretaceous Belly River formation. … eastward regression of the late Cretaceous Colorado sea. The …
Dec 31, 1957
Earth Sciences Report
… of the area is composed of Upper Cretaceous unconsolidated …