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Abstract

The sedimentary sequences of the upper Miocene in the Strymon basin in Northern Greece are composed of sedimentary rocks and are separated on an entirely new lithostratigraphic shape. Fossil-fauna has been collected from specific parts of the described geological sections, which mainly include mollusks from Bivalvia and Gastropoda. From laboratory research on the micro-fauna and micro-flora a number of taxonomic units of Foraminifera were determined and representatives of Actinozoa, Bryozoa, Crinoidea, Ostracoda, Otolithus, Diatomeae and Charophyta were found, which give a more-complete biostratigraphical image of the sediments. Based on these investigations with the use of the biofacial analysis, through the study of palaeoecology data of the fossils, three basic types of palaeohabitat and development of organisms were identified and a new palaeogeographic interpretation of the depositional environments in the Miocene basin is given.

Abstract

Rare Late Miocene Seal Taxa (Carnivora, Phocidae) from the North Sea Basin. Koretsky, I., Rahmat, S., Peters, N. - Th e discovery of new late Miocene fossil true seals from the North Sea Basin in Northern Europe provides important information regarding the radiation of monachines and phocines in the Eastern Atlantic. Examination of the first fossil seal remains from the Gram Formation, western Denmark, allowed redescriptions and emended diagnoses of several taxa. Analysis of diagnostic material recovered from western Denmark and Th e Netherlands shows the presence of at least three phocid genera and reveals new information on the taxonomic variability of true seals. Due to the close relationships that exist between these phocid faunas, a correlation was demonstrated between different localities of Northern and Western Europe and provides the opportunity to associate localities of the Western and Central Paratethys with the eastern and western shores of the North Atlantic. Morphological analyses of postcranial material identifi ed three new late Miocene species (Pontophoca jutlandica, Subfamily Monachinae; Gryphoca nordica and Platyphoca danica, both Subfamily Phocinae), suggesting that the maximum evolutionary diversity of mid-Tertiary phocids occurred first in the Paratethys and later in the North Atlantic Basins.

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