Results: 1 - 4 of 4
Dec 31, 1957
Bulletin
… Lower Cenomanian substage of the Upper Cretaceous. Lithologic sections are … John area. The Lower Cretaceous-Upper Cretaceous boundary occurs at …
Apr 07, 2016
Presentation
… coarse-grained lenses. In the Upper Cretaceous–Paleogene bedrock …
Dec 19, 2014
Poster
… (approx. 420,000 km2) includes Upper Cretaceous aquifers to Recent age …
Dec 31, 1967
Bulletin
… interbedded, and lenticular, Upper Cretaceous argillaceous siltstones …