Biostratigraphic and tectonic implications of 40Ar-39Ar dates of ash layers from the northeast Gulf of Alaska

Abstract

Research Article| August 01, 1978 Biostratigraphic and tectonic implications of 40Ar-39Ar dates of ash layers from the northeast Gulf of Alaska L. G. HOGAN; L. G. HOGAN 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar K. F. SCHEIDEGGER; K. F. SCHEIDEGGER 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar L. D. KULM; L. D. KULM 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar J. DYMOND; J. DYMOND 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar N. MIKKELSEN N. MIKKELSEN 2University of California, San Diego, Scripps Institution of Oceanography, La Jolla, California 92093 Search for other works by this author on: GSW Google Scholar Author and Article Information L. G. HOGAN 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 K. F. SCHEIDEGGER 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 L. D. KULM 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 J. DYMOND 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 N. MIKKELSEN 2University of California, San Diego, Scripps Institution of Oceanography, La Jolla, California 92093 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1978) 89 (8): 1259–1264. https://doi.org/10.1130/0016-7606(1978)89<1259:BATIOA>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation L. G. HOGAN, K. F. SCHEIDEGGER, L. D. KULM, J. DYMOND, N. MIKKELSEN; Biostratigraphic and tectonic implications of 40Ar-39Ar dates of ash layers from the northeast Gulf of Alaska. GSA Bulletin 1978;; 89 (8): 1259–1264. doi: https://doi.org/10.1130/0016-7606(1978)89<1259:BATIOA>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 Ash layers from Deep Sea Drilling Project site 178 in the northeast Pacific Ocean have been dated by the 40Ar-39Ar stepwise heating technique to resolve published discrepancies concerning the length of time explosive volcanism has affected the eastern Aleutian arc and Alaskan Peninsula. The results of the investigation indicate that the record of ash-fall deposition at site 178 extends back at least 6.5 m.y. Assuming that 6.5 m.y. ago marks the onset of renewed calc-alkalic volcanism of the volcanic arc, proposed models of continuous and discontinuous motion between the Pacific and North American lithospheric plates can be evaluated. If appreciable time elapsed between the onset of subduction and the onset of arc volcanism, the 6.5-m.y. record of ash-fall deposition in the north-east Pacific is most compatible with models of continuous plate motion throughout late Cenozoic time. 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.