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Conference of the Arabian Journal of Geosciences

CAJG 2018: Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas pp 179–181Cite as

Rudist Mud Mounds and Biostromes from Upper Cretaceous of Istria (Croatia)

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Abstract

In addition to biostromes which are the most common paleo-enviromental appearance of rudist congregations, in Upper Cretaceous of Istria, rare rudist mud-mounds were investigated. The aim of this work is to present the appearance of rudist congregations with respect to the lithofaces characteristics of paleo-environment. Rudist congregations could appear within both mud mounds and biostromes in relatively shallow subtidal. They are the result of the interaction of the accommodation space adequate to the thriving for radiolitids and carbonate sedimentation rate. The shallowing and the decrease of accommodation space are indicated in mud mounds by thin sheets of densely packed F–R with fragments of radiolitids at the top of beds together with lateral migration of congregations within mud mound marked by flanks. They are visible as lamination. In case when radiolitid congregations throve in shallower subtidal paleo-environment with less accommodation space, they appear through biostromes.

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Authors and Affiliations

  1. Faculty of Science, Department of Geology, University of Zagreb, Horvatovac 102A, 10000, Zagreb, Croatia

    Alan Moro

  2. Gruppo Speleologico Monfalconese, Via Valentinis, 134, I - 34074, Monfalcone, Italy

    Alceo Tarlao

  3. Dipartimento Di Matematica E Geoscienze, Università Di Trieste, Via Weiss, 2, 34127, Trieste, Italy

    Giorgio Tunis

Authors
  1. Alan Moro
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  2. Alceo Tarlao
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  3. Giorgio Tunis
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Corresponding author

Correspondence to Alan Moro .

Editor information

Editors and Affiliations

  1. Faculty of Sciences of Bizerte, University of Carthage, Amilcar, Tunisia

    Mabrouk Boughdiri

  2. Earth Science Department, University of Zaragoza, Zaragoza, Spain

    Beatriz Bádenas

  3. University of Kansas, Lawrence, KS, USA

    Paul Selden

  4. University of Grenoble Alpes, Grenoble, France

    Etienne Jaillard

  5. Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany

    Peter Bengtson

  6. University of Bretagne Occidentale, Brest, France

    Bruno R.C. Granier

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Moro, A., Tarlao, A., Tunis, G. (2019). Rudist Mud Mounds and Biostromes from Upper Cretaceous of Istria (Croatia). In: Boughdiri, M., Bádenas, B., Selden, P., Jaillard, E., Bengtson, P., Granier, B. (eds) Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas. CAJG 2018. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-01452-0_43

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