Cordilleran slab windows

Abstract

Research Article| September 01, 1989 Cordilleran slab windows Derek J. Thorkelson; Derek J. Thorkelson 1Department of Earth Sciences, Carleton University, Ottawa-Carleton Geoscience Centre, Ottawa K1S 5B6, Canada Search for other works by this author on: GSW Google Scholar Richard P. Taylor Richard P. Taylor 1Department of Earth Sciences, Carleton University, Ottawa-Carleton Geoscience Centre, Ottawa K1S 5B6, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Derek J. Thorkelson 1Department of Earth Sciences, Carleton University, Ottawa-Carleton Geoscience Centre, Ottawa K1S 5B6, Canada Richard P. Taylor 1Department of Earth Sciences, Carleton University, Ottawa-Carleton Geoscience Centre, Ottawa K1S 5B6, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1989) 17 (9): 833–836. https://doi.org/10.1130/0091-7613(1989)017<0833:CSW>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 Derek J. Thorkelson, Richard P. Taylor; Cordilleran slab windows. Geology 1989;; 17 (9): 833–836. doi: https://doi.org/10.1130/0091-7613(1989)017<0833:CSW>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 geometry and geologic implications of subducted spreading ridges are topics that have bedeviled earth scientists ever since the recognition of plate tectonics. As a consequence of subduction of the Kula-Farallon and East Pacific rises, slab windows formed and migrated beneath the North American Cordillera. The probable shape and extent of these windows, which represent the asthenosphere-filled gaps between two separating, subducting oceanic plates, are depicted from the Late Cretaceous to the present. Possible effects of the existence and migration of slab windows on the Cordillera at various times include cessation of arc volcanism and replacement by rift or plate- edge volcanism; lithospheric uplift, attenuation, and extension; and increased intensity of compressional tectonism. Eocene extensional tectonism and alkaline magmatism in southern British Columbia and the northwestern United States were facilitated by slab-window development. 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.