Abstract
The sedimentary environment of two Middle Miocene (Badenian) algal-related biofacies is analysed to determine algal-bioherm and algal-detrital biofacies. Two environmental parameters are taken into account, namely bathymetry and the hydrodynamic regime. Actualistic comparisons with two modern Mediterranean biocoenoses as well as faunistic data are the basis for the reconstruction of bathymetry. Both biofacies are postulated to have formed within the depth range of 20–50 m. Analysis of internal structures of rhodoliths made it possible to determine the energy conditions. The algal biofacies is regarded as having formed under turbulent conditions, while the algal-detrital biofacies formed under unstable hydrodynamic conditions.
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