Results: 1 - 3 of 3
May 31, 2000
Earth Sciences Report
… indicates that the Lower Cretaceous McMurray Formation was … included the Lower, Middle and Upper McMurray (Carrigy, 1959). … formerly defined as Middle and Upper McMurray show no difference …
Dec 31, 1960
Bulletin
… basal sandstone member of the Upper Cretaceous Belly River formation. … eastward regression of the late Cretaceous Colorado sea. The …
Feb 28, 1946
Report
… to be underlain by non-marine Upper Cretaceous rocks in which coal …