Physical Control and Age of Dike Formations in the Maine Coastal Region
Chapman CA, Wingard PS, National Park Service, Acadia National Park. 1958. Physical Control and Age of Dike Formations in the Maine Coastal Region. Geological Society of America Bulletin. 69:1193-1196
The age and trend of the dikes helped in establishing the relative ages of certain host rocks on Mount Desert Island. "In summary, basic dikes of at least four ages are recognized. It is clear that age and trend of the dikes are related, a fact that has aided in establishing the relative ages of certain host rocks. The average trend of successively younger dike sets has appeared to have rotated counterclockwise through nearly 90 degrees. Except for the oldest dike set, successively younger sets represent correspondingly lower intensities of dilation and have probably resulted from successively lower intensities of stretching. Dike frequency is virtually independent of age of the host rock but varies with brittleness, attitude of planar structures, and amount of host rock stretching." STUDY LOCATIONS: MOUNT DESERT ISLAND
- Type
- Journal Article
- Authors
- Chapman, Carleton; Wingard, Paul; National Park Service, Acadia National Park
- Units
- ACAD
- Keywords
- Dating, Dikes (Geologic), Geology, Mount Desert Island