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Article Dans Une Revue Geological Magazine Année : 2006

Environmental control on granular clinoforms of ancient carbonate shelves

Amélie Quiquerez

Résumé

The purpose of this paper is to document the influence of depositional environments on shallow-water, low-relief clinoforms from the description of five ancient carbonate platforms: the Neoproterozoic (Namibia), Middle Jurassic (France), Lower Cretaceous (France), Upper Cretaceous (Oman) and Miocene (Turkey). These examples have been investigated on the basis of field observations. The clinoforms are described with reference to geometric and compositional attributes: declivity, shape, height, sedimentary structures, sediment fabric and components. The results show great variability in stratal geometry, declivity and facies distribution: (1) depositional profiles vary from exponential, to sigmoidal, to oblique; (2) maximal slope angles range from 3 to 25 degrees, most of them being grouped between 10 and 18 degrees; (3) facies differentiation identified from lateral facies successions along beds, and vertical facies successions through beds, is pronounced to subtle. This study documents linkages between depositional environments and clinoform attributes.
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Dates et versions

hal-00092763 , version 1 (12-09-2006)

Identifiants

  • HAL Id : hal-00092763 , version 1

Citer

Amélie Quiquerez, Gilles Dromart. Environmental control on granular clinoforms of ancient carbonate shelves. Geological Magazine, 2006, 143, pp.343-365. ⟨hal-00092763⟩
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