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Subdivision et datation de la molasse "d'eau douce" inférieure du plateau suisse

Publication date1977

The paper by Zimmermann et al. (1976) is reviewed. The stratigraphic value of Nannofossils - known from the Molasse for nearly fourty years - is questioned, in view of their scarcity, of reworking, and of possible contamination from the glacial deposits rich in such organisms. It is shown that indexes S and C are identical, though differently expressed, with quartz/feldspar and dolomite/calcite ratios long since investigated by numerous authors. The D units do not agree with paleontological data, nor with data provided by other mineralogical methods. The relationship between Index D and tectonism is questioned. Various problems, such as the extension of the marine Lower-Middle Oligocene, the Chattian/Rupelian and Aquitanian/Chattian boundaries, and the transgression of the Upper Marine Molasse are discussed.

Citation (ISO format)
RIGASSI-STUDER, Danilo, (ed.). Subdivision et datation de la molasse ‘d’eau douce’ inférieure du plateau suisse. In: Paleolab news = Bulletin Paleolab, 1977, n° 1.
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  • PID : unige:157126

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