Results: 1 - 4 of 4
Sep 10, 2019
Report
… characterization of the Upper Cretaceous–Quaternary units in the … Characterization of the Upper Cretaceous–Quaternary 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 19, 2014
Poster
… (approx. 420,000 km2) includes Upper Cretaceous aquifers to Recent age …
Feb 28, 1946
Report
… to be underlain by non-marine Upper Cretaceous rocks in which coal …