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Tidal signatures in a shelf-margin delta

2006; Geological Society of America; Volume: 34; Issue: 4 Linguagem: Inglês

10.1130/g22078.1

1943-2682

Don I. Cummings, R. W. C. Arnott, Bruce S. Hart,

Methane Hydrates and Related Phenomena

Research Article| April 01, 2006 Tidal signatures in a shelf-margin delta Don I. Cummings; Don I. Cummings 1Department of Earth Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada Search for other works by this author on: GSW Google Scholar R. William C. Arnott; R. William C. Arnott 1Department of Earth Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada Search for other works by this author on: GSW Google Scholar Bruce S. Hart Bruce S. Hart 2Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 2A7, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Don I. Cummings 1Department of Earth Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada R. William C. Arnott 1Department of Earth Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada Bruce S. Hart 2Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 2A7, Canada Publisher: Geological Society of America Received: 19 Jul 2005 Revision Received: 22 Nov 2005 Accepted: 29 Nov 2005 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2006) 34 (4): 249–252. https://doi.org/10.1130/G22078.1 Article history Received: 19 Jul 2005 Revision Received: 22 Nov 2005 Accepted: 29 Nov 2005 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Don I. Cummings, R. William C. Arnott, Bruce S. Hart; Tidal signatures in a shelf-margin delta. Geology 2006;; 34 (4): 249–252. doi: https://doi.org/10.1130/G22078.1 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 Based on its anomalous thickness (∼150 m) and stratigraphic position above continental-slope mudstone, an upward-coarsening succession consisting in part of tidal rhythmites in the Glenelg Field, offshore Nova Scotia, Canada, is interpreted to be a strongly tide-influenced shelf-margin-delta deposit. A large, funnel-shaped erosional shelf-edge invagination is observed where the paleoshelf edge is resolved in three-dimensional seismic data adjacent to Glenelg. We propose that the delta at Glenelg prograded into a similar shelf-edge invagination within which tidal currents were amplified and wave energy was attenuated. Given that funnel-shaped invaginations (e.g., slope canyon heads, slump scars, fluvially incised knickmarks) are relatively common along modern shelf edges, and that fluvio-deltaic systems should be focused into these topographic lows during regression across the shelf, it seems likely that shelf-edge invaginations play an important but underappreciated role in mediating terrigenous clastic sedimentation during sea-level lowstands. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.