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Bathymetry and sediment geometry of the Greater Antilles outer ridge and vicinity
Tucholke, B.E.; Ewing, J.I. (1974). Bathymetry and sediment geometry of the Greater Antilles outer ridge and vicinity. Geol. Soc. Am. Bull. 85(11): 1789-1802. https://hdl.handle.net/10.1130/0016-7606(1974)85<1789:BASGOT>2.0.CO;2
In: Geological Society of America bulletin. GEOLOGICAL SOC AMER, INC: New York, N.Y.. ISSN 0016-7606; e-ISSN 1943-2674
Peer reviewed article  

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Trefwoorden
    Data > Acoustic data
    Interfaces > Sediment-water interface
    Measurement > Depth measurement > Bathymetry
    Motion > Sediment movement
    Motion > Water motion > Water currents > Undercurrents > Western boundary undercurrents
    Palaeo studies
    Records > Analog records > Seismic profiles > Seismic reflection profiles
    Sedimentation
    Sediments
    Topographic features > Submarine features > Ridges > Submarine ridges
    Water > Bottom water

Auteurs  Top | Datasets 
  • Tucholke, B.E.
  • Ewing, J.I.

Abstract
    Detailed examination of 20,000 km of seismic reflection profiles and data on cores and abyssal currents suggests that the Greater Antilles Outer Ridge has been constructed by differential deposition of sediment from the Western Boundary Undercurrent above the seismic reflector, Horizon A. Deposition of acoustically stratified sediments under the eastern sector of the outer ridge was apparently terminated in the late middle Eocene when the incipient formation of the present Puerto Rico Trench cut off downslope sediment movement from the northeastern Antilles. At about the same time, the newly formed Western Boundary Undercurrent, possibly interacting with Antarctic Bottom Water entering from the South Atlantic, began to preferentially deposit acoustically transparent sediment to form the eastern outer ridge. Stratified sediments were deposited in the region of the present western outer ridge until the middle Miocene, when increased Antarctic Bottom Water flow apparently diverted the sediment-laden Western Boundary Undercurrent and produced a flow pattern which initiated deposition of the acoustically transparent sediment now forming the western ridge sector. Since that event, the resultant morphology of the Greater Antilles Outer Ridge has diverted the Western Boundary Undercurrent into a contour-following flow, causing further depositional construction of the entire outer ridge. * Present address: Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964.

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

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