Theory for a clinoform of permanent form on a continental margin emplaced by weak, dilute muddy turbidity currents

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A clinoform is a prograding sedimentary deposit. Of interest here are the clinoforms that constitute the building blocks of continental margins.A continental margin consists of a continental shelf, i.e. a shallow region near the shore of a continent that gently slopes seaward, followed by a continental slope, i.e. a steeper region that drops off into deep water. In many cases the continental slope itself constitutes a clinoform that progrades into deeper water. In other cases, and especially near river mouths, a given margin may have several coexisting clinoforms. Many margin clinoforms tend to be muddy. Here a theory of clinoform progradation is developed. The clinoform is assumed to be continuous in the along-shelf direction. A wave-current boundary layer is assumed to stir up a dilute suspension of mud, which then moves slowly as a sheet down the shelf slope in the direction of deep water. Near the shelf-slope rollover the turbidity current loses wave agitation, and forms a net-depositional flow that results in clinoform progradation. When simplified to the case of a horizontal deep-water basement, constant sea level and negligible tectonism, the theory allows a solution for a clinoform of permanent form, i.e. one that progrades without changing shape.

Original languageEnglish (US)
Title of host publicationRiver, Coastal and Estuarine Morphodynamics
Subtitle of host publicationRCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics
Pages553-561
Number of pages9
Volume1
StatePublished - 2006
Event4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2005 - Urbana, IL, United States
Duration: Oct 4 2005Oct 7 2005

Other

Other4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2005
CountryUnited States
CityUrbana, IL
Period10/4/0510/7/05

Fingerprint

turbidity current
Turbidity
continental margin
deep water
Water
progradation
continental slope
Sea level
continental shelf
Suspensions
Boundary layers
mud
Deposits
boundary layer
Rivers
sea level
river
Direction compound

ASJC Scopus subject areas

  • Ecological Modeling
  • Environmental Chemistry

Cite this

Parker, G. (2006). Theory for a clinoform of permanent form on a continental margin emplaced by weak, dilute muddy turbidity currents. In River, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics (Vol. 1, pp. 553-561)

Theory for a clinoform of permanent form on a continental margin emplaced by weak, dilute muddy turbidity currents. / Parker, Gary.

River, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics. Vol. 1 2006. p. 553-561.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Parker, G 2006, Theory for a clinoform of permanent form on a continental margin emplaced by weak, dilute muddy turbidity currents. in River, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics. vol. 1, pp. 553-561, 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2005, Urbana, IL, United States, 10/4/05.
Parker G. Theory for a clinoform of permanent form on a continental margin emplaced by weak, dilute muddy turbidity currents. In River, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics. Vol. 1. 2006. p. 553-561
Parker, Gary. / Theory for a clinoform of permanent form on a continental margin emplaced by weak, dilute muddy turbidity currents. River, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics. Vol. 1 2006. pp. 553-561
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