Mesozoic–Paleogene Structural Evolution of the Southern U.S. Cordillera As Revealed in the Little and Big Hatchet Mountains, GEOSPHERE; V
Research Paper GEOSPHERE Mesozoic–Paleogene structural evolution of the southern U.S. Cordillera as revealed in the Little and Big Hatchet Mountains, GEOSPHERE; v. 14, no. 1 southwest New Mexico, USA doi:10.1130/GES01539.1 Christopher A. Clinkscales1 and Timothy F. Lawton2 1 12 figures; 1 table; 1 supplemental file Department of Geosciences, University of Arizona, 1040 4th Street, Tucson, Arizona 85721, USA 2Centro de Geociencias, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Campus Juriquilla, Juriquilla, QRO 76230, México CORRESPONDENCE: clinkscales@ email .arizona .edu ABSTRACT Upper Eocene–Oligocene ignimbrites and volcaniclastic rocks of the Boot Heel volcanic field of southwestern New Mexico unconformably overlie Lara- CITATION: Clinkscales, C.A., and Lawton, T.F., 2018, Mesozoic–Paleogene structural evolution A Mesozoic to Paleogene polyphase tectonic model presented here for mide syntectonic strata and bury eroded Laramide structures. The distribution of the southern U.S. Cordillera as revealed in the the southern United States (U.S.) Cordillera provides new insight into style of the Paleogene volcanic rocks in the Little Hatchet and Big Hatchet Moun- Little and Big Hatchet Mountains, southwest New and timing of Mesozoic–Paleogene deformation and basin formation in the tains is in part controlled by synmagmatic east-west and northwest-south- Mexico, USA: Geosphere, v. 14, no. 1, p. 162–186, doi:10.1130/GES01539.1. region south of the Colorado Plateau and Mogollon-Datil volcanic field. The east normal faults active from ca. 34 to 27 Ma, the age range of rhyolite dikes model proposes reverse reactivation of Jurassic normal faults during Late intruded along the faults.
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