The Allens Ranch 7.5' quadrangle is located in the eastern Basin and Range Province at the southern end of Cedar Valley and on the west side of Goshen Valley, Utah County, Utah. The quadrangle includes the northern part of the East Tintic Mountains and is within the North Tintic mining district. Bedrock exposed in the quadrangle includes Cambrian to Pennsylvanian passive-margin marine rock units, which have been faulted and folded during the Sevier orogeny. The area also includes subduction-related Paleogene volcanic and sedimentary rocks from the Soldiers Pass and East Tintic volcanic fields, and a Miocene extension-related lava of the Mosida Basalt. Surficial deposits consist of unconsolidated lacustrine, alluvial, colluvial, and spring deposits of mostly late Pleistocene and Holocene age.
by Adam P. McKean, Bart J. Kowallis, Eric H. Christiansen, Richard W. Bradshaw, and Ryan L. Harbor,
32 p., 2 plates,