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Dec 31, 1970
Bulletin
… undisturbed non-marine Cretaceous and Paleocene strata are … the lithology of the uppermost Cretaceous and Paleocene beds … sandstones with time. Most of Upper Cretaceous and Paleocene …
Dec 31, 1957
Bulletin
… Lower Cenomanian substage of the Upper Cretaceous. Lithologic sections are … John area. The Lower Cretaceous-Upper Cretaceous boundary occurs at …
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 …