Rocky Mountain Foreland Areas
Typically, the old Precambrian basement is described as "granite" in sample descriptions of wells that have penetrated the basement. Actually, the basement is a variety of igneous and metamorphic rocks. Intrusive relations can be seen in areas, and dikes can be readily mapped on aerial photograph- Landsat images. Schists, gneisses, amphibolites, and other such rocks make up the general basement "complex."
Figures & Tables
This publication begins with the basics of definition and description of a foreland, and in particular North American foreland areas. It then goes into detail on Rocky Mountain foreland areas, covering general information, age of basement complexes, basement rock types, angles of basement faulting, contrast of structural concepts, predominant structural styles, and drape versus dynamic folding of sediments.