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Closing of the Midcontinent rift-A far—field effect of Grenvillian compression
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1994
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EngineeringEarth ScienceRegional GeologyGrenvillian CompressionGeophysicsRift SystemCrustal DeformationSeismic StratigraphyGrenville ProvinceGeological DataRegional TectonicsGeodesyMidcontinent RiftNeotectonicsGeographyGeologyEngineering GeologyGeology 1994TectonicsStructural GeologyEconomic GeologyEarth Sciences
Research Article| February 01, 1994 Closing of the Midcontinent rift-A far—field effect of Grenvillian compression William F. Cannon William F. Cannon 1U.S. Geological Survey, Mail Stop 954, Reston, Virginia 22092 Search for other works by this author on: GSW Google Scholar Geology (1994) 22 (2): 155–158. https://doi.org/10.1130/0091-7613(1994)022<0155:COTMRA>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 MailTo Tools Icon Tools Get Permissions Search Site Citation William F. Cannon; Closing of the Midcontinent rift-A far—field effect of Grenvillian compression. Geology 1994;; 22 (2): 155–158. doi: https://doi.org/10.1130/0091-7613(1994)022<0155:COTMRA>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 The Midcontinent rift formed in the Laurentian supercontinent between 1109 and 1094 Ma. Soon after rifting, stresses changed from extensional to compressional, and the central graben of the rift was partly inverted by thrusting on original extensional faults. Thrusting culminated at about 1060 Ma but may have begun as early as 1080 Ma. On the southwest-trending arm of the rift, the crust was shortened about 30 km; on the southeast-trending arm, strike-slip motion was dominant. The rift developed adjacent to the tectonically active Grenville province, and its rapid evolution from an extensional to a compressional feature at ca. 1080 Ma was coincident with renewal of northwest-directed thrusting in the Grenvllle, probably caused by continent-continent collision. A zone of weak lithosphere created by rifting became the locus for deformation within the otherwise strong continental lithosphere. Stresses transmitted from the Grenville province utilized this weak zone to close and invert the rift. 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.