engleski

Tectonic dynamics during the Cretaceous in the Istrian part of the Adriatic Carbonate Platform (NW Croatia)

In the region of the western Istrian anticline, erosional remains of the transgressive Eocene Foraminiferal limestones overly shallow-water deposits of Early Cretaceous age (Valanginian, Hauterivian and Barremian). This evidence, together with the occurrence of bauxite deposits and Palaeogene beds overlying Albian, Cenomanian and Senonian limestones indicate the very high relief of the land transgressed by the Palaeogene sea. Contrary to the traditional connection between the formation of the western Istrian anticline and the Laramian tectonic phase at the end of the Cretaceous (Maastrichtian), new investigations suggest sporadic synsedimentary tectonic movements from the Hauterivian to the end of the Cretaceous. With these movements, formation of the anticline structure began in the Early Cretaceous, with the emerged apical parts representing land areas throughout most of the Cretaceous. The emerged areas were inhabited by dinosaurs, during the stratigraphic range from the Late Hauterivian to the Upper Cenomanian (at least), as evidenced by relics of their footprints and bones. The Laramian tectonic phase, which is in the Dinarides attributed to be of the youngest Cretaceous (Maastrichtian) and oldest Palaeogene age, at least in the area of the western Istrian anticline represents only one of the tectonic phases within the Cretaceous tectonic cycle, characterised by the same tectonic coordinates since the Neocomian (determined in the Hauterivian and Cenomanian, and registered in the Aptian and Albian).

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nije evidentirano