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TitleDistribution of subtidal sedimentary bedforms in a macrotidal setting: the Bay of Fundy, Atlantic Canada
AuthorTodd, B J; Shaw, J; Li, M Z; Kostylev, V E; Wu, Y
SourceContinental Shelf Research vol. 83, 2014 p. 64-85, https://doi.org/10.1016/j.csr.2013.11.017
Year2014
Alt SeriesEarth Sciences Sector, Contribution Series 20130110
PublisherElsevier
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceEastern offshore region
AreaBay of Fundy
Lat/Long WENS -65.5833 -64.9167 45.3333 45.0000
Subjectssedimentology; marine geology; geophysics; bedforms; bedform movement; sand waves; tidal currents; tidal scours; tidal deposits; tidal environments; macrotidal environment; bathymetry
Illustrationslocation maps; images; histograms; rose diagrams; seismic profiles; photographs
ProgramRenewable Energies, Environmental Geoscience
AbstractThe Bay of Fundy, Canada, a large macrotidal embayment with the World's highest recorded tides, was mapped using multibeam sonar systems. High-resolution imagery of seafloor terrain and backscatter strength, combined with geophysical and sampling data, reveal for the first time the morphology, architecture, and spatial relationships of a spectrum of bedforms: (1) flow-transverse bedforms occur as both discrete large two-dimensional dunes and as three-dimensional dunes in sand sheets; (2) flow- parallel bedforms are numerous straight ridges described by others as horse mussel bioherms; (3)sets of banner banks that flank prominent head lands and major shoals. The suite of bedforms developed during the Holocene, as tidal energy increased due to the bay approaching resonance. We consider the evolution of these bedforms, their migration potential and how they may place limitations on future in-stream tidal power development in the Bay of Fundy.
Summary(Plain Language Summary, not published)
The Bay of Fundy, Canada, a large macrotidal embayment with the World¿s highest recorded tides, was mapped using multibeam sonar systems. High-resolution imagery of seafloor terrain and backscatter strength, combined with geophysical and sampling data, reveal for the first time the morphology, architecture, and spatial relationships of a spectrum of bedforms: 1) flow-transverse bedforms occur as both discrete large two-dimensional dunes and as three-dimensional dunes in sand sheets; 2) flow-parallel bedforms are numerous straight ridges described by others as horse mussel bioherms; 3) sets of banner banks that flank prominent headlands and major shoals. The suite of bedforms developed during the Holocene, as tidal energy increased due to the bay approaching resonance. We consider the evolution of these bedforms, their migration potential and how they may place limitations on future in-stream tidal power development in the Bay of Fundy.
GEOSCAN ID292732