IGB

Connexion

(Colloque - 1984)

Document title

Utilisation des grès et conglomérats récifaux émergés en tant qu'indicateurs des variations récentes du niveau marin in Le beach-rock.

Authors(s) and Affiliation(s)

MONTAGGIONI L. F. ; PIRAZZOLI P. A. ; Comité National Français de Géographie ;  Centre National de la Recherche Scientifique. (CNRS). GIS Maison de l'Orient Méditerranéen ;  Université Lyon II ; 

Abstract

In many Pacific islands, reef tracts possess emerged sandstones and conglomerates, ranging from the present to about 6, 000 years B.P. in age. Determining the environments of their lithification allowed their reliability of indicators of recent sea level changes to be estimated. Two environments of early cementation have been recognized: 1) a permanently submerged zone, characterized by abundance of high-magnesian calcite pelleted micrite and a relatively low residual porosity. 2) A zone exposed to periods of emergence, characterized by the abundance of aragonite gravitational cements and a relatively high porosity. Such sandstones and conglomerates are believed to be accurate indicators of former sea stands.

Source

Congrès

Colloque ()

ISBN : 2-903264-37-6

Editor : Unknown country of publication (1984)

Millesime : 1984 [pp. 91-97]

Bibliographic references : 37 réf.

Language

Français

Localisation

Laboratoire INTERGEO - Paris

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