Tectonic synthesis of the Ouachita orogenic belt
George W. Viele, William A. Thomas, 1989. "Tectonic synthesis of the Ouachita orogenic belt", The Appalachian-Ouachita Orogen in the United States, Robert D. Hatcher, Jr., William A. Thomas, George W. Viele
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The tectonic history of the Paleozoic Ouachita orogenic belt composes a complete Wilson cycle: the early history records the rifting of the southern margin of the North American craton and the opening of an ocean basin in which marginal and basinal pre-orogenic sediments were deposited; the later history records the closing of that ocean basin by south-directed subduction and the accompanying deposition and deformation of synorogenic clastic sediments. The off-shelf, pre-orogenic rocks and the deepwater, synorogenic rocks compose the “Ouachita fades” (Fig. 1; Plates 9, 11), deposited beside but not on the North American craton, although the youngest synorogenic sediments lapped onto the southern margin of the craton. Rocks of the Ouachita facies were thrust onto the southern margin of the North American craton during the final stages of ocean closing and constitute the Ouachita orogenic belt. Geologic structures related to the Ouachita orogeny extend beyond the boundaries of the orogenic belt into the cratonal interior.
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The Appalachian-Ouachita Orogen in the United States
Includes 14 chapters on the Appalachian orogen, 15 of the Ouachita orogen, and a chapter on the connection between them beneath the eastern Gulf Coastal Plain. The Appalachian chapters synthesize the geologic development of the orogen by tectonostratigraphic intervals (pre-orogenic, Taconic, Acadian, Alleghanian, and post-Alleghanian), and also treat Paleozoic paleontologic control, regional geophysics, thermal history of the crystalline terranes, parts of the orogen buried beneath the Atlantic and eastern Gulf coastal plains, regional geomorphology, mineral and energy resources; an integration chapter also is included. The Ouachita chapters cover physical stratigraphy and biostratigraphy of the Paleozoic rocks, structural geology, a synthesis of the subsurface geology beneath the western Gulf Coastal Plain, a review of the mineral and energy resources, regional geophysics, and a tectonic synthesis. Twelve excellent plates provide four-color geologic maps, structural cross sections, tectonic syntheses, and geophysical maps; a black-and-white synthesis of Appalachian mineral deposits, and a reflection seismic cross section.