Geology of Lukachukai Mountains area, Apache County, Arizona
Report on the geology of the Lukachukai Mountains. Thirteen thousand feet of sedimentary rock were deposited in the Lukachukai Mountains area prior to Laramide deformation at the end of Cretaceous when the major structural features were formed. Monoclinal flexures may have resulted from draping of the surficial sediments over normal or reverse faults at depth. Erosion during early Tertiary stripped almost 9,000 feet of rock from the Lukachukai Mountains before deposition of the Tohatchi and Chuska formations in middle Tertiary. Intrusion of minette and diorite porphyry, differentiated from a ...
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