Izvorni znanstveni članak
https://doi.org/10.17794/rgn.2018.4.3
MIDDLE MIOCENE DROWNED RAMP IN THE VICINITY OF MARIJA BISTRICA (NORTHERN CROATIA)
Jasenka Sremac
orcid.org/0000-0002-4736-7497
; Department of Geology, Faculty of Science, University of Zagreb, Horvatovac 102 a, 10000 Zagreb
Kristina Tripalo
orcid.org/0000-0003-2814-9723
; Department of Geology, Faculty of Science, University of Zagreb, Horvatovac 102 a, 10000 Zagreb
Marko Repac
; Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, 10000 Zagreb, student
Marija Bošnjak
; Croatian Natural History Museum, Demetrova 1, 10000 Zagreb, curators
Davor Vrsaljko
; Croatian Natural History Museum, Demetrova 1, 10000 Zagreb, curators
Tihomir Marjanac
; Department of Geology, Faculty of Science, University of Zagreb, Horvatovac 102 a, 10000 Zagreb
Alan Moro
orcid.org/0009-0002-1195-8057
; Department of Geology, Faculty of Science, University of Zagreb, Horvatovac 102 a, 10000 Zagreb
Borna Lužar-Oberiter
; Department of Geology, Faculty of Science, University of Zagreb, Horvatovac 102 a, 10000 Zagreb
Karmen Fio Firi
orcid.org/0000-0002-9944-2305
; Department of Geology, Faculty of Science, University of Zagreb, Horvatovac 102 a, 10000 Zagreb
Šimun Aščić
; Department of Geology, Faculty of Science, University of Zagreb, Horvatovac 102 a, 10000 Zagreb
Sažetak
Fossiliferous Middle Miocene deposits from the surroundings of Marija Bistrica (north-east of Zagreb) transgressively overly older pre-Cenozoic bedrocks. Fossils from shallow marine environments are in most cases preserved as bioclasts, while deep marine calcareous oozes characterize the pelagic marls. The age of the transgressive sequence is estimated on the basis of planktic biota from marls (foraminifera, nannoplankton and pteropods) as the Badenian NN5 Nannozone. The following palaeoenvironments can be distinguished or presumed on the basis of biota and sedimentary features: (1) beach characterized by polymictic conglomerates with rhodolith-rich carbonate matrix; (2) oyster banks, recognized from secondarily found oyster clusters; (3) lagoons marked with compact bioclastic deposits and rhodolith-halimeda assemblage; (4) patch-reefs recognized from the surrounding bioclastic deposits; (5) shallow subtidal mäerl beds preserved as loose bioclastic deposits and (6) distal slope argillaceous marls with pelagic biota. Palaeoenvironmental analyses indicate rapid drowning, most probably corresponding to the transgression during the Middle Badenian TB 2.4 3rd order transgressive-regressive sequence.
Ključne riječi
langhian; transgression; palaeoenvironment; biostratigraphy; Medvednica Mt
Hrčak ID:
205590
URI
Datum izdavanja:
7.9.2018.
Posjeta: 1.803 *