The Plomosa Pass area of the northern Plomosa Mountains contains exposures of deformed Paleozoic and Mesozoic metasedimentary and metaigneous rocks that are part of the Maria Tectonic Belt which trends westnorthwest from west-ce_ntral Arizona into southeastern California. The Maria Tectonic Belt was primarily developed during Mesozoic basement-involved crustal shortening and is inferred to have been located near the Mesozoic margin of the North American craton. Detailed (1:3000 scale) geologic mapping and structural analysis of the approximately 6 km2 Plomosa Pass area reveal a complex structural history.
Online resource:
Steinke, T.R., Structure and Kinematics of the Plomosa Pass Area, Northern PIomosa Mountains, Arizona. Arizona Geological Survey, Contributed Report CR-12-E, text and 5 map plates. http://repository.azgs.az.gov/uri_gin/azgs/dlio/1907
