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Investigations of the bottom current sculpted margin of Hatton Bank, NE Atlantic
MacLachlan, S.E.; Elliott, G.M.; Parson, L.M. (2008). Investigations of the bottom current sculpted margin of Hatton Bank, NE Atlantic. Mar. Geol. 253(3-4): 170-184. https://hdl.handle.net/10.1016/j.margeo.2008.05.012
In: Marine Geology. Elsevier: Amsterdam. ISSN 0025-3227; e-ISSN 1872-6151, more
Peer reviewed article  

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Keyword
    Bottom currents
Author keywords
    currents; sediment waves; sediment drift; Hatton Bank; NE Atlantic Ocean

Authors  Top | Datasets 
  • MacLachlan, S.E.
  • Elliott, G.M.
  • Parson, L.M.

Abstract
    The northwest Hatton Bank margin is an ideal locality to demonstrate the interaction between bottom currents and slope configuration in controlling the distribution and morphology of bottom current deposits. The slope area investigated is isolated from any major terrigenous sediment supply and at present is influenced by the Deep Northern Boundary Current (DNBC). Swath bathymetry and high resolution acoustic data allow us to evaluate both local and regional controls on slope sedimentation and the possible mechanisms for bottom-current velocity variability across a slope setting within the NW European continental margin. The slope exhibits sculpting by bottom currents that flow in a predominantly southwest to northeast direction, and is only locally modified by slope failures. Positive relief features such as the Endymion Spur play an important role in constraining and accelerating bottom-current flow and, consequently, in redistributing sediment along the margin. We demonstrate that the size, morphology and distribution of bottom-current deposits along the slope vary as a function of the interaction between bottom currents, regional slope orientation and local seafloor topography.

Datasets (2)
  • Global contourite distribution database, version 2, more
  • Global contourite distribution database, version 3, more

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