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Swiss Journal of Geosciences
Fig. 2 | Swiss Journal of Geosciences

Fig. 2

From: New paleontological and biostratigraphical data (calcareous nannofossils, ostracods, brachiopods), correlations and lithostratigraphic units in the Urgonian facies (latest Hauterivian-Barremian) of the Swiss and French Jura Mountains: the Falaises Member and the Saars Formation (former “Gorges de l’Orbe Formation”)

Fig. 2

Reworked pebble of Urgonien Blanc facies (whitish bioclastic packstone with detrital quartz and glauconite of the upper Vallorbe Formation) from the Eocene paleokarst infilling of Alfermée (Canton Bern) described by Renz (1936). External part of the sample characterized by thick red halo of deep impregnation with iron hydroxides after very long stay in ferruginous “terra rossa” of paleosols and karst cavities, and weathered surface of alteration with loose micritized Late Barremian orbitolinid Paracoskinolina cf. maynci (Chevalier, 1961) of approximately 1.3 × 0.8 mm, spines of sea urchins and fragments of small oysters. Collection and photos P.-O. Mojon with field binocular stereomicroscope Leitz and Nikon Coolpix S8000

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