Dinosaur tracks as an indicator of peritidal environment: an example from Late Hauterivian of Palud bay, Croatia (CROSBI ID 529481)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Mezga, Aleksandar ; Cvetko Tešović, Blanka ; Bajraktarević, Zlatan
engleski
Dinosaur tracks as an indicator of peritidal environment: an example from Late Hauterivian of Palud bay, Croatia
The Lower Cretaceous carbonate succession of Palud bay (Istria, Croatia) is characterized by shallow-water limestones deposited in peritidal environments (shallow subtidal to intertidal) with several shallowing– upward cycles. Those cycles are composed of mudstones, peloidal wackestones/packstones, peloidal packstones/grainstones and fenestral mudstones to wackestones with geopetal infill. The microfossil assemblage, found within limestones and dominated by ostracods associated with foraminifera and green algae (dasycladales), probably indicates the Late Hauterivian age. A dozen of large circular-elliptical dinosaur footprints with indistinct morphology have been found on the outcrop. They are situated on the upper– bedding plane of a single layer. The clearly pronounced expulsion rims around the tracks represents compressed waterlogged sediment squeezed from the print by the weight of the dinosaur. Such high rims indicate the greater softness of the substrate on which the animals moved. All of the footprints are of nearly same shape and size what indicate their belongings to the same animal. The footprints are circular to elliptical in shape with no clearly visible digit impressions and with average length of 30 cm. The sediment which forms the trackbearing layer is fenestral mudstone with numerous geopetal infills. The footprints, together with the sedimentological features, prove short exposure of the layer to meteoric conditions and indicate intertidal environments.
dinosaur tracks; palaeoenvironment; Palud bay; Croatia
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Podaci o prilogu
276-x.
2007.
objavljeno
Podaci o matičnoj publikaciji
25th IAS Meeting of Sedimentology, Abstracts Book
Zelilidis, Avram
Patras:
Podaci o skupu
25th IAS Meeting of Sedimentology
poster
04.09.2007-07.09.2007
Patras, Grčka