Research Article| May 01, 1990 High eustatic sea level during the middle Pliocene:Evidence from the southeastern U.S. Atlantic Coastal Plain Harry J. Dowsett; Harry J. Dowsett 1U.S. Geological Survey, 970 National Center, Reston, Virginia 22092 Search for other works by this author on: GSW Google Scholar Thomas M. Cronin Thomas M. Cronin 1U.S. Geological Survey, 970 National Center, Reston, Virginia 22092 Search for other works by this author on: GSW Google Scholar Author and Article Information Harry J. Dowsett 1U.S. Geological Survey, 970 National Center, Reston, Virginia 22092 Thomas M. Cronin 1U.S. Geological Survey, 970 National Center, Reston, Virginia 22092 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (5): 435–438. https://doi.org/10.1130/0091-7613(1990)018<0435:HESLDT>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 Email Tools Icon Tools Get Permissions Search Site Citation Harry J. Dowsett, Thomas M. Cronin; High eustatic sea level during the middle Pliocene:Evidence from the southeastern U.S. Atlantic Coastal Plain. Geology 1990;; 18 (5): 435–438. doi: https://doi.org/10.1130/0091-7613(1990)018<0435:HESLDT>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 The middle Pliocene, ∼3.5-2.5 Ma, was a period of global warmth preceding the growth of major Northern Hemisphere ice sheets. We report on eustatic sea level for the middle Pliocene based on micropaleontologic study of marine deposits of the Duplin Formation of South Carolina and North Carolina. The Duplin was deposited during a middle Pliocene marine transgression that formed the Orangeburg scarp, a prominent wave-cut geomorphic paleoshoreline of the southeastern U.S. Atlantic Coastal Plain. We conclude that (1) the scarp in South Carolina was formed mostly during the middle Pliocene (3.5-3.0 Ma), (2) eustatic sea level was about 35±18 m higher than modern sea level (the scarp has been uplifted about 50-65 m since the middle Pliocene), and (3) ocean-water temperatures along eastern North America were warmer when the scarp was formed than they are at present. 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.
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Dowsett et al. (1990) studied this question.