Naslov
Upper Cretaceous transgressive sediments with rudists and corals from northern Croatia, Slovenia and Bosnia

Autori
Moro, A., Horvat, A., Tomić, V., Sremac, J., Bermanec, V.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Tenth International Congress on Rudists Bivalves - Bellaterra, June 22-27. 2014. / Pons, Jose Maria and Vincens, Enric - Barcelona : Universitat Autonoma de Barcelona, 2014, 17-18

Skup
Tenth International Congress on Rudist Bivalves

Mjesto i datum
Barcelona, Španjolska, 22.07.2014. - 27.07.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Upper Cretaceous; rudists; corals; transgressive sediments

Sažetak
At localities in northern Croatia (Donje Orešje, Gornje Orešje, Brašljevica and Sv. Martin) Slovenia (Stranice) and Bosnia (Bešpelj) successions of shallow water Upper Cretaceous deposits occur, represented by alternating clastic and carbonate sediments with rudist and coral communities, which transgressively overlay Triassic, Jurassic or Upper Cretaceous basement rocks. Transgressive succession for investigated localities with diverse facies could be vertically divided into a lower clastic sediments with corals, middle mixed clastic-carbonate sediments with corals and rudists and upper carbonate sediments with rudists. Third facies could pass into pelagic limestones or marls with nannofossils. The lower clastic facies consists of sediments with corals. In middle facies both, corals and rudists are present, later through highly abundant paucispecific community. Upper facies comprises carbonate sediments where corals are completely absent or appears at the beginning of the facies only. Rudist community of the carbonate facies could range from mixed assemblage with individuals of radiolitids and hippuritids to relatively low-abundant, monospecific assemblage with individuals of hippuritids and sporadically present other genera. Different abundance of rudists and corals within different facies could be dependable upon sediment type and paleorelief conditions. The depositional setting of the investigated transgressive successions presumably variate due to the more or less pronounced basement topography. In places with low paleorelief, transgressive succession starts with clastic facies, while on steeper one with carbonate facies

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA