Les croûtes calcaires (calcretes) du Purbeckien du Mont-Salève (Haute-Savoie, France)

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Les croûtes calcaires (calcretes) du Purbeckien du Mont-Salève (Haute-Savoie, France)

STRASSER, Andréas, DAVAUD, Eric Jean

Abstract

Plusieurs niveaux de calcrete observés dans le Purbeckien du Mont-Salève sont décrits et analysés. Ils montrent des traces de racines et de nombreuses figures caractéristiques d'une exposition subaérienne durable. Ces observations permettent de préciser l'environnement dans lequel les faciès saumâtres et lagunaires du Purbeckien se sont déposés. La genèse de ces calcretes est comparable à celle des croûtes anciennes et actuelles décrites dans la littérature.

STRASSER, Andréas, DAVAUD, Eric Jean. Les croûtes calcaires (calcretes) du Purbeckien du Mont-Salève (Haute-Savoie, France). Eclogae Geologicae Helvetiae, 1982, vol. 75, no. 2, p.

287-301

DOI : 10.5169/seals-165232

Available at:

http://archive-ouverte.unige.ch/unige:154094

Disclaimer: layout of this document may differ from the published version.

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