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      UPPER KIMMERIDGIAN AND TITHONIAN AMMONITES FROM THE TUNISIAN "DORSALE" (NE TUNISIA): UPDATED BIOSTRATIGRAPHY FROM THE JEBEL OUST

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          Abstract

          <p class="abstract-testo">In the context of updating biostratigraphic analysis in the Upper Kimmeridgian-lowermost Berriasian from the whole of the Tunisian Dorsale (NE Tunisia), new results obtained from the Jebel Oust reference section are presented. The bed-by-bed-sampling of a rather rich ammonite fauna gathered in the two most favourable profiles in the area allowed to propose, for the first time, a biozonation for Upper Kimmeridgian to Tithonian limestones. Calpionellids relayed or completed ammonite assemblages, and were also useful for biostratigraphy in beds close to the Jurassic-Cretaceous boundary. The composition of ammonite assemblages, as well as the known ranges for genera and species, is in accordance with the available information from epioceanic areas in West-Mediterranean Tethys. The recognized biozones fit the standard proposal given by Groupe Français D'Etude du Jurassique in 1997. Age-interpretation for turbiditic horizons in the Jebel Oust is made for the first time. In spite of some limitations, the biostratigraphic results obtained in Jebel Oust sections provide a valuable tool for potential correlations with poorly known sections in northern Tunisia, as well as with other Tethyan areas.</p><p class="abstract-testo"> </p>

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          Author and article information

          Journal
          Rivista Italiana di Paleontologia e Stratigrafia
          Università degli Studi di Milano
          01 July 2005
          : 111
          : 2
          Article
          a828ee8befab4b6c822d719ce456f3a1
          10.13130/2039-4942/6320

          RIPS is published under a Creative Commons Attribution-NonCommercial-NoDerivatives Licence 4.0 International (CC BY-NC-ND 4.0). The journal allows the author(s) to hold the copyright without restrictions. To view a copy of this license, visit https://creativecommons.org/licenses/by-nc-nd/4.0/

          Categories
          Geology
          QE1-996.5
          Paleontology
          QE701-760

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