Tectonic development of southern Narragansett Bay and offshore Rhode Island

Abstract

Research Article| October 01, 1980 Tectonic development of southern Narragansett Bay and offshore Rhode Island Robert L. McMaster; Robert L. McMaster 1Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 Search for other works by this author on: GSW Google Scholar Jelle de Boer; Jelle de Boer 2Department of Earth and Environmental Sciences, Wesleyan University, Middletown, Connecticut 06457 Search for other works by this author on: GSW Google Scholar Barclay P. Collins Barclay P. Collins 3Gulf Science and Technology Company, P.O. Box 2030, Pittsburgh, Pennsylvania 15230 Search for other works by this author on: GSW Google Scholar Author and Article Information Robert L. McMaster 1Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 Jelle de Boer 2Department of Earth and Environmental Sciences, Wesleyan University, Middletown, Connecticut 06457 Barclay P. Collins 3Gulf Science and Technology Company, P.O. Box 2030, Pittsburgh, Pennsylvania 15230 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1980) 8 (10): 496–500. https://doi.org/10.1130/0091-7613(1980)8<496:TDOSNB>2.0.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 Robert L. McMaster, Jelle de Boer, Barclay P. Collins; Tectonic development of southern Narragansett Bay and offshore Rhode Island. Geology 1980;; 8 (10): 496–500. doi: https://doi.org/10.1130/0091-7613(1980)8<496:TDOSNB>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 Total magnetic intensity and seismic refraction are used to define tectonic features on the inner shelf beneath Block Island and Rhode Island Sounds. Magnetic lineaments suggest a tectonic pattern of rhombo-hedral basement blocks controlled by northwest and north-northeast to northeast fault sets. Similar patterns predominate in the basement complexes of Rhode Island and Connecticut.From the geophysical data, the Narragansett Basin is inferred to continue at least 16 to 22 km off the Rhode Island coast. Here grabens or half grabens, filled with Pennsylvanian(?) metasediments may lie on either side of a central basement horst. Another Carboniferous basin may exist farther seaward on the Long Island platform.The Narragansett Basin probably evolved in early Carboniferous time as a pull-apart basin between en echelon zones of left-lateral northeast-trending faults. Later episodes affecting the basin include a Permian compressional event, the consequence of a regional change to dextral shear along the same fundamental faults; a second phase of east-west extension in Late Triassic–Jurassic time; and a post-Cretaceous event during which regional fracture systems were reactivated by vertical movements. 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.