Isotopic evidence for geochemical decoupling between ancient epeiric seas and bordering oceans: Implications for secular curves

Research Article| June 01, 1998 Isotopic evidence for geochemical decoupling between ancient epeiric seas and bordering oceans: Implications for secular curves C. Holmden; C. Holmden 1Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar R. A. Creaser; R. A. Creaser 1Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar K. Muehlenbachs; K. Muehlenbachs 1Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar S. A. Leslie; S. A. Leslie 2Department of Geological Sciences, Ohio State University, 155 South Oval Mall, Columbus, Ohio 43210-1397 Search for other works by this author on: GSW Google Scholar S. M. Bergström S. M. Bergström 2Department of Geological Sciences, Ohio State University, 155 South Oval Mall, Columbus, Ohio 43210-1397 Search for other works by this author on: GSW Google Scholar Author and Article Information C. Holmden 1Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta T6G 2E3, Canada R. A. Creaser 1Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta T6G 2E3, Canada K. Muehlenbachs 1Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta T6G 2E3, Canada S. A. Leslie 2Department of Geological Sciences, Ohio State University, 155 South Oval Mall, Columbus, Ohio 43210-1397 S. M. Bergström 2Department of Geological Sciences, Ohio State University, 155 South Oval Mall, Columbus, Ohio 43210-1397 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1998) 26 (6): 567–570. https://doi.org/10.1130/0091-7613(1998)026<0567:IEFGDB>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 C. Holmden, R. A. Creaser, K. Muehlenbachs, S. A. Leslie, S. M. Bergström; Isotopic evidence for geochemical decoupling between ancient epeiric seas and bordering oceans: Implications for secular curves. Geology 1998;; 26 (6): 567–570. doi: https://doi.org/10.1130/0091-7613(1998)026<0567:IEFGDB>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 Isotopic analysis of conodonts and their host limestones sampled between two regionally extensive, altered volcanic ash layers in eastern Laurentia shows that a 454 Ma epeiric sea maintained large lateral differences in Nd and C isotope compositions. This is consistent with inferred temperature-salinity–defined epicontinental water masses and restricted circulation between epicontinental and oceanic environments. Because the majority of old marine fossils and sedimentary rocks are known from epeiric seas, some isotope excursions in ancient marine strata may originate from expansion and contraction of geochemically distinct epicontinental water masses, rather than global-scale changes in the state of the earth-ocean 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.