HR: 16:00h
AN: PP52C-01 INVITED     [PDF]
TI: Temporal and spatial changes in sedimentation along the margins of the North Atlantic
AU: * Weaver, P
EM: p.weaver@soc.soton.ac.uk
AF: SOuthampton Oceanography Centre, Empress Dock, Southampton, SO14 3ZH United Kingdom
AB: The seafloor along both the eastern and western margins of the North Atlantic is dominated by features produced during times of lowered sealevel and modified during the Holocene. The most striking features are glacial outwash fans, giant landslides and canyoned margins with associated filled basins. The landslides occur in areas of high accumulation and can relocate hundreds to thousands of cubic kilometres of sediment in single erosive events. Off NW Africa up to 20% of sediment may be remobilized by landslides, with each event leaving a hiatus. Each of these hiatuses extends over an average area of 4800 km2 and represents removal of sediment layers several tens of meters thick and of several hundred thousand years duration. Evidence will be presented to show that the rate of redeposition is related to climate/sealevel change in some basins.
DE: 1223 Ocean/Earth/atmosphere interactions (3339)
DE: 1635 Oceans (4203)
DE: 1815 Erosion and sedimentation
DE: 3022 Marine sediments--processes and transport
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2003 Fall Meeting