Trans-Hudson orogen and Williston basin in Montana and North Dakota: New COCORP deep-profiling results (1993)

Research Article| May 01, 1993 Trans-Hudson orogen and Williston basin in Montana and North Dakota: New COCORP deep-profiling results K. D. Nelson; K. D. Nelson 1Department of Geology, Syracuse University, Syracuse, New York 13224 Search for other works by this author on: GSW Google Scholar D. J. Baird; D. J. Baird 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 Search for other works by this author on: GSW Google Scholar J. J. Walters; J. J. Walters 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 Search for other works by this author on: GSW Google Scholar M. Hauck; M. Hauck 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 Search for other works by this author on: GSW Google Scholar L. D. Brown; L. D. Brown 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 Search for other works by this author on: GSW Google Scholar J. E. Oliver; J. E. Oliver 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 Search for other works by this author on: GSW Google Scholar J. L. Ahern; J. L. Ahern 3School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma 73019 Search for other works by this author on: GSW Google Scholar Z. Hajnal; Z. Hajnal 4Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0, Canada Search for other works by this author on: GSW Google Scholar A. G. Jones; A. G. Jones 5Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar L. L. Sloss L. L. Sloss 6Department of Geological Sciences, Northwestern University, Evanston, Illinois 60201 Search for other works by this author on: GSW Google Scholar Author and Article Information K. D. Nelson 1Department of Geology, Syracuse University, Syracuse, New York 13224 D. J. Baird 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 J. J. Walters 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 M. Hauck 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 L. D. Brown 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 J. E. Oliver 2Institute for the Study of the Continents, Cornell University, Ithaca New York 14853 J. L. Ahern 3School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma 73019 Z. Hajnal 4Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0, Canada A. G. Jones 5Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario K1A 0Y3, Canada L. L. Sloss 6Department of Geological Sciences, Northwestern University, Evanston, Illinois 60201 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (5): 447–450. https://doi.org/10.1130/0091-7613(1993)021<0447:THOAWB>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation K. D. Nelson, D. J. Baird, J. J. Walters, M. Hauck, L. D. Brown, J. E. Oliver, J. L. Ahern, Z. Hajnal, A. G. Jones, L. L. Sloss; Trans-Hudson orogen and Williston basin in Montana and North Dakota: New COCORP deep-profiling results. Geology 1993;; 21 (5): 447–450. doi: https://doi.org/10.1130/0091-7613(1993)021<0447:THOAWB>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract COCORP (Consortium for Continental Reflection Profiling) deep reflection profiling across the Williston basin and underlying Trans-Hudson orogen shows the following. (1)There is no evidence for a precursor rift basin beneath the axis of the Williston basin. With the exception of small-scale structures (e.g., Nesson and Cedar Creek anticlines), the basement surface beneath the Williston basin is smooth and has a dish-shaped geometry. (2) Crustal penetrating reflections within the eastern Trans-Hudson orogen dip eastward, in apparent contradiction to the "conventional view" that the Superior province underthrusts the eastern side of the orogen. (3) Basement reflections beneath the center of the orogen define a broad crustal-scale antiform, the axis of which coincides approximately with the depocenter of the overlying Williston basin. Midcrustal reflections defining the crest and western flank of this antiform also coincide generally with the location and shape of the source of the North American Central Plains conductivity anomaly. (4) Crustal penetrating reflections beneath the western side of the orogen dip westward, supporting the current view that subduction polarity was to the west beneath the Wyoming province. (5) The eastern edge of the Wyoming province is marked by east-dipping upper-crustal reflections and subhorizontal lower-crustal reflections that are truncated by the west-dipping reflectivity of the Trans-Hudson orogen. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.