OS32A:
Enhancing Geoscientific Understanding of Marine and Lacustrine Systems With Modern Seafloor Mapping Techniques I

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Session ID#: 6962

Session Description:
Scientific understanding of marine and lacustrine geologic processes has been enhanced multi-fold over the past two decades with the general use of multibeam sonars, interferometric sonars and other swath mapping techniques. By imaging ocean and lake floors with unprecedented detail, these methods have enhanced the power of seabed and lakebed researchers to interpret subaqueous morphology, sediment distribution, geological feature formation, and to monitor the activity of seafloor and lakefloor processes. This session invites presentations of enhanced scientific interpretation and explanation of seabed and lakebed issues and questions which have been facilitated by high-resolution seafloor mapping, commonly in conjunction with related investigations. Surveys leading to understanding of seabed/lakebed feature origins, geohazard and benthic habitat assessment, energy development, and Law of the Sea continental shelf extensions are some examples of investigations of scientific, and applied significance invited for presentation in this session. (Sponsored by Marine Geoscience Division, Geological Association of Canada)
Chairs:  Michael C F Lewis, Geological Survey of Canada Atlantic, Dartmouth, NS, Canada, John E Hughes Clarke, University of New Brunswick, Fredericton, NB, Canada and Patrick Lajeunesse, Université Laval, Département de Géographie, Québec City, QC, Canada
OSPA Liaison:  John E Hughes Clarke, University of New Brunswick, Fredericton, NB, Canada
Primary Convener:  Michael C F Lewis, 'Geological Survey of Canada Atlantic, Natural Resources Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada
Conveners:  John E Hughes Clarke, University of New Brunswick, Fredericton, NB, Canada and Patrick Lajeunesse, Université Laval, Département de Géographie, Québec City, QC, Canada
Index Terms:

3002 Continental shelf and slope processes [MARINE GEOLOGY AND GEOPHYSICS]
3022 Marine sediments: processes and transport [MARINE GEOLOGY AND GEOPHYSICS]
3045 Seafloor morphology, geology, and geophysics [MARINE GEOLOGY AND GEOPHYSICS]
4239 Limnology [OCEANOGRAPHY: GENERAL]
Co-Sponsor(s):
  • MRG - Mapping and Regional Geology
  • PP - Paleoceanography and Paleoclimatology
  • SG - Sedimentary Geology and Paleobiology
  • S - Seismology

Abstracts Submitted to this Session:

OS32A-01
Results from the first Topo-Bathymetric lidar surveys of the Chiroptera II sensor: Improved geological mapping and coastal hydrodynamic models (34982)
Timothy L Webster, Kevin McGuigan and Nathan Crowell, Nova Scotia Community College, Applied Geomatics Research Group, Lawrencetown, NS, Canada
OS32A-02
Morphodynamics in Sediment-Starved Inner-Shelf Submarine Canyons (Pointe-des-Monts, Eastern Canada) (34172)
Alexandre Normandeau1, Patrick Lajeunesse1, Guillaume St-Onge2, Pierre Francus3, Michael Dietze VI4 and Daniel Bourgault5, (1)Université Laval, Département de géographie, Québec, QC, Canada, (2)University of Quebec at Rimouski UQAR, Canada Research Chair in Marine Geology, Rimouski, QC, Canada, (3)Inst Nat Recherche Sci, Québec, QC, Canada, (4)Deutsches GeoForschungsZentrum GFZ, Section 4.6 Geomorphology, Potsdam, Germany, (5)Institut des Sciences de la Mer de Rimouski, Rimouski, QC, Canada
OS32A-03
Acoustic Imaging of the Transition from Fluvial Suspension to Density Underflow on a Marine Delta Lip (34981)
John E Hughes Clarke1, Peter J Talling2 and Matthieu Cartigny2, (1)University of New Brunswick, Fredericton, NB, Canada, (2)National Oceanography Centre,, Southampton, Hamps, United Kingdom
OS32A-04
Understanding Sediment Flux Through Delta-top Channels Using Repetitive Multibeam and Hydrodynamic Modeling (35137)
Danar Guruh Pratomo and John E Hughes Clarke, University of New Brunswick, Fredericton, NB, Canada
OS32A-05
Evidence for Subglacial Meltwater Floods Through the Lake Ontario and Eastern Lake Erie Basins (34428)
Michael C F Lewis and Brian J Todd, 'Geological Survey of Canada Atlantic, Natural Resources Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada
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