Oligocene glacio–eustasy and erosion on the margins of the North Atlantic

Abstract

Research Article| January 01, 1985 Oligocene glacio–eustasy and erosion on the margins of the North Atlantic Kenneth G. Miller; Kenneth G. Miller 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Gregory S. Mountain; Gregory S. Mountain 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Brian E. Tucholke Brian E. Tucholke 2Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar Author and Article Information Kenneth G. Miller 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Gregory S. Mountain 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Brian E. Tucholke 2Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1985) 13 (1): 10–13. https://doi.org/10.1130/0091-7613(1985)13<10:OGAEOT>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 Kenneth G. Miller, Gregory S. Mountain, Brian E. Tucholke; Oligocene glacio–eustasy and erosion on the margins of the North Atlantic. Geology 1985;; 13 (1): 10–13. doi: https://doi.org/10.1130/0091-7613(1985)13<10:OGAEOT>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 SocietyGeology Search Advanced Search Abstract Oligocene foraminiferal δ18O records suggest the development of ice caps (= inferred glacio–eustatic falls) at ca. 36, 31, and 25 Ma. Biostratigraphic analyses of wells from the United States east coast and Irish continental margins consistently show that upper Oligocene sediments overlie a diachronous erosional surface, underlain by lower Oligocene to Eocene strata. At the minimum, the hiatus extends between ca. 34 and 30 Ma. We speculate that erosion during a glacio–eustatic fall near the early/late Oligocene boundary (ca. 32–31 Ma) developed (1) an unconformity on the margins, (2) numerous canyons noted in seismic profiles from the margins of the North Atlantic, and (3) a coastal offlap event. Using δ18O data, we apply a model for eustatic changes and margin response that explains the relationships of sea level, unconformities, and coastal onlap/offlap events. 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.