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

ASJC Scopus subject areas

  • Ecological Modeling
  • Environmental Chemistry

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    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)