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Periplatform drift; the combined result of contour current and off-bank transport along carbonate platforms

Christian Betzler, Sebastian Lindhorst, Gregor P. Eberli, Thomas Luedmann, Juergen Moebius, Juliane Ludwig, Ilona Schutter, Marco Wunsch, John J. G. Reijmer and Christian Huebscher
Periplatform drift; the combined result of contour current and off-bank transport along carbonate platforms
Geology (Boulder) (October 2014) 42 (10): 871-874

Abstract

Hydroacoustic and sedimentological data from the western leeward flank of the Great Bahama Bank document the interplay of off-bank sediment export, along-slope transport, and erosion, which together shape facies and thickness distribution of slope carbonates. The integrated data set depicts the combined product of these processes and allows formulation of a comprehensive model of a periplatform drift that significantly amends established models of carbonate platform slope facies distribution and geometry. The basinward-thinning wedge of the periplatform drift at the foot of the bank escarpment displays along-slope and downslope variations in sedimentary architecture. Sediments are muddy carbonate sands that coarsen basinward. The drift wedge has a pervasive cover of cyclic steps. In zones of lower contour current speed, depth-related facies belts develop, whereas strike-discontinuous sediment lobes, scarps, and gullies characterize areas with higher current speed. This understanding of the impact of currents on carbonate-slope sedimentation has wider implications for seismic and sequence stratigraphic interpretation of carbonate platforms and for applied aspects such as hydrocarbon exploration.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 42
Serial Issue: 10
Title: Periplatform drift; the combined result of contour current and off-bank transport along carbonate platforms
Affiliation: Universitaet Hamburg, Institut fuer Geologie, Hamburg, Germany
Pages: 871-874
Published: 201410
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 24
Accession Number: 2014-082855
Categories: OceanographyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2014308
Illustration Description: illus. incl. sects., sketch map
N22°00'00" - N26°00'00", W79°19'60" - W76°00'00"
Secondary Affiliation: University of Miami, USA, United StatesVrije Universiteit Amsterdam, NLD, Netherlands
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201443
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