Oligocene eustasy from two-dimensional sequence stratigraphic backstripping

Abstract

Research Article| March 01, 2001 Oligocene eustasy from two-dimensional sequence stratigraphic backstripping Michelle A. Kominz; Michelle A. Kominz 1Department of Geosciences, Western Michigan University, 1187 Rood Hall, Kalamazoo, Michigan 49008-5150, USA Search for other works by this author on: GSW Google Scholar Stephen F. Pekar Stephen F. Pekar 2Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964-8000, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Michelle A. Kominz 1Department of Geosciences, Western Michigan University, 1187 Rood Hall, Kalamazoo, Michigan 49008-5150, USA Stephen F. Pekar 2Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964-8000, USA Publisher: Geological Society of America Received: 27 May 1999 Revision Received: 20 Dec 1999 Accepted: 28 Feb 2000 First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2001) 113 (3): 291–304. https://doi.org/10.1130/0016-7606(2001)113<0291:OEFTDS>2.0.CO;2 Article history Received: 27 May 1999 Revision Received: 20 Dec 1999 Accepted: 28 Feb 2000 First Online: 01 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 Michelle A. Kominz, Stephen F. Pekar; Oligocene eustasy from two-dimensional sequence stratigraphic backstripping. GSA Bulletin 2001;; 113 (3): 291–304. doi: https://doi.org/10.1130/0016-7606(2001)113<0291:OEFTDS>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 Estimates of the magnitudes of changes in third-order (0.5−2 m.y.) eustasy were obtained for Oligocene sequences defined by a suite of largely onshore boreholes of the New Jersey coastal plain. Benthic foraminiferal biofacies and multiple age constraints in a sequence stratigraphic framework formed the database for this study. The geometry of the margin through time was determined using two-dimensional backstripping. The depth ranges of benthic foraminiferal biofacies were determined from a combination of standard factor analysis techniques and the backstripped geometries. Benthic foraminiferal biofacies were then used to determine the depths of the Oligocene margin profiles obtained from backstripping. The water depths of 16 of these horizons were confirmed by independent benthic biofacies determinations from at least two wells. This internal consistency indicates that the data and the two-dimensional backstripping approach were robust. Where benthic biofacies require a vertical shift of the horizons generated by two-dimensional backstripping, eustatic changes were required and were readily calculated.Results indicate a major eustatic fall from the end of the Eocene to the first record of Oligocene deposition. Subsequent long-term shoaling of sea level through the Oligocene was ∼30 m in 10 m.y. Superimposed on this long-term trend were higher frequency (third-order) variations in eustasy with amplitudes of ∼40 m or less. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.