Hierarchy of sea-level cycles in the medial Silurian siliciclastic succession of Pennsylvania

Research Article| March 01, 1988 Hierarchy of sea-level cycles in the medial Silurian siliciclastic succession of Pennsylvania Edward Cotter Edward Cotter 1Department of Geology, Bucknell University, Lewisburg, Pennsylvania 17837 Search for other works by this author on: GSW Google Scholar Geology (1988) 16 (3): 242–245. https://doi.org/10.1130/0091-7613(1988)016<0242:HOSLCI>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 Edward Cotter; Hierarchy of sea-level cycles in the medial Silurian siliciclastic succession of Pennsylvania. Geology 1988;; 16 (3): 242–245. doi: https://doi.org/10.1130/0091-7613(1988)016<0242:HOSLCI>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 medial Silurian siliciclastic succession in central Pennsylvania records two hierarchically superimposed cycles of sea-level fluctuations. The larger of these cycles controlled lithofacies architecture at the magnitude of formations and members. Five alternations of transgression and regression, with an average cycle period of about 2.5 m.y., produced wedges of coarser, shallow-water facies pointing basinward (northwest) and wedges of deeper water, basin-center mudrock facies extending marginward (southeast). Superimposed on these are smaller scale, shallowing-upward cycles, typically 1-3 m thick, that occur in three different, contemporaneous facies: basin-margin tidal flats, mid-shelf offshore bars, and below wave base in the storm-influenced transition to the basin center. Average recurrence interval for such smaller cycles was about 100 ka; their period was regular and was caused by sea-level fluctuations of about 1-3 m. 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.