Results: 1 - 3 of 3
Nov 18, 2008
Data
… data are reported for 123 Cretaceous rock samples from … for mudstones, shales and other Cretaceous rocks of northwestern …
Dec 31, 1960
Bulletin
… sandstone member of the Upper Cretaceous Belly River formation. … eastward regression of the late Cretaceous Colorado sea. The …
Oct 31, 2007
Earth Sciences Report
… deposits are hosted in Jurassic, Cretaceous and Eocene sandstone …