Results: 1 - 2 of 2
Dec 31, 1960
Bulletin
… basal sandstone member of the Upper Cretaceous Belly River formation. … eastward regression of the late Cretaceous Colorado sea. The …
Nov 28, 2011
Open File Report
… mafic sills and dikes, and the Cretaceous alkaline sills and dikes … lead-zinc prospect within the Upper Devonian Palliser Formation …