Genèse de la morphologie des atolls: le cas de Mururoa (Polynésie Française) - MNHN - Muséum national d'Histoire naturelle Access content directly
Journal Articles Comptes Rendus de l'Académie des Sciences de Paris.Série 2 : Sciences de la Terre et des Planètes Year : 1990

Genèse de la morphologie des atolls: le cas de Mururoa (Polynésie Française)

Abstract

A paleoecological study of cored wells located both in the lagoon and on the periphery of the atoll documents the major stages of build-up the Plio-Quaternary reef. Acquisition of atoll morphology has occurred by progressive differentiation between sheltered internal zones, where biodetrital sedimentation is dominant, and seaward edge characterized by organic construction. On its seaward edge, the atoll is composed of a prograding system of fringing reefs, each edified during a period of sea-level rise. Thus, atoll genesis does not result simply from progressive subsidence, nor from preferential dissolution of the central zone of a carbonate platform.

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Earth Sciences
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Dates and versions

mnhn-02866800 , version 1 (12-06-2020)

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  • HAL Id : mnhn-02866800 , version 1

Cite

Christine Perrin. Genèse de la morphologie des atolls: le cas de Mururoa (Polynésie Française). Comptes Rendus de l'Académie des Sciences de Paris.Série 2 : Sciences de la Terre et des Planètes, 1990, 311, pp.671-678. ⟨mnhn-02866800⟩

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