Quaternary Faulting in the Eastern Alaska Range

Abstract

Research Article| June 01, 1971 Quaternary Faulting in the Eastern Alaska Range D.H RICHTER; D.H RICHTER U.S. Geological Survey, Anchorage, Alaska 99501 Search for other works by this author on: GSW Google Scholar N. A MATSON, JR N. A MATSON, JR U.S. Geological Survey, Anchorage, Alaska 99501 Search for other works by this author on: GSW Google Scholar Author and Article Information D.H RICHTER U.S. Geological Survey, Anchorage, Alaska 99501 N. A MATSON, JR U.S. Geological Survey, Anchorage, Alaska 99501 Publisher: Geological Society of America Received: 28 Sep 1970 Revision Received: 25 Jan 1971 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1971, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1971) 82 (6): 1529–1540. https://doi.org/10.1130/0016-7606(1971)82[1529:QFITEA]2.0.CO;2 Article history Received: 28 Sep 1970 Revision Received: 25 Jan 1971 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation D.H RICHTER, N. A MATSON; Quaternary Faulting in the Eastern Alaska Range. GSA Bulletin 1971;; 82 (6): 1529–1540. doi: https://doi.org/10.1130/0016-7606(1971)82[1529:QFITEA]2.0.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 SocietyGSA Bulletin Search Advanced Search Abstract Quaternary faulting is well displayed along the Denali fault system and the recently recognized and related Totschunda fault system in the eastern Alaska Range. The principal movement on both fault systems is right-lateral strike-slip. Offset glacial features of Wisconsin age indicate minimum Holocene slip rates of 1.1 to 3.5 cm per year along parts of the Denali fault system, and 0.9 to 3.3 cm per year along the Totschunda fault system. Strike-slip movement along the Denali fault system may be no older than early Pliocene and, southeast of the Totschunda fault system junction, may have terminated by the middle Pleistocene. The strike-slip Totschunda fault system, a much younger feature probably no older than middle Pleistocene, exhibits 9 to 10 km of right-lateral offset and 1,500 m of relative vertical movement. The Totschunda fault system is aligned with, and has the same sense of slip as, the Fairweather fault in the Gulf of Alaska.The Denali fault system and the Queen Charlotte Islands fault are part of a major transform fault system separating the North American and Pacific plates. Continental southern Alaska between the Aleutian arc and the Denali fault system is now largely coupled to the Pacific plate. The Totschunda-Fairweather alignment probably represents the beginning of a new transform fault by-passing the southeast part of the Denali fault system. 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.