International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

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An account of the bio- and magnetostratigraphy of the Upper Tithonian—Lower Berriasian interval at Le Chouet, Drôme (SE France)

Published: Dec 2013

Pages: 437 - 460

DOI: https://doi.org/10.2478/geoca-2013-0030

Authors: WILLIAM A. P. WIMBLEDON, DANIELA REHÁKOVÁ, ANDRZEJ PSZCZÓŁKOWSKI, CRISTINA E. CASELLATO, EVA HALÁSOVÁ, CAMILLE FRAU, LUC G. BULOT, JACEK GRABOWSKI, KATARZYNA SOBIEŃ, PETR PRUNER, PETR SCHNABL, KRISTÝNA ČÍŽKOVÁ

Abstract: This paper discusses the results of a study of the Le Chouet section, its lithologies, facies, magnetic proper- ties and fossil record (ammonites, calcareous nannofossils, calpionellids and calcareous dinoflagellates). Data obtained have been applied to give a precise biostratigraphy for this carbonate sequence as well as a paleoenvironmental recon- struction. Its relationship to magnetostratigraphy, based on a modern study of a French site, is important. Investigation of the micro- and macrofossils shows that the site comprises a sedimentary sequence in the Microcanthum to Jacobi ammonite Zones, and the Chitinoidella, Crassicollaria and Calpionella Zones. Several calpionellid and nannofossil bioevents have been recorded on the basis of the distribution of stratigraphically important planktonic organisms. The site allows us to calibrate the levels of various biomarkers and biozonal boundaries, and correlate them with the magnetozones M20n, M19r and M19n.

Keywords: Tithonian, Berriasian, integrated biostratigraphy, magnetostratigraphy, microfacies, ammonites, calcareous nannofossils, calcareous dinoflagellates, calpionellids

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Volume 64 no. 6 / December 2013

Volume 64 no. 6