Analysis of the trace fossils from Paleogene formations of the Central Western Carpathian (Orava region)
Journal Title: Geology, Geophysics & Environment - Year 2016, Vol 42, Issue 1
Abstract
Up to now only little attention was dedicated to the study of the trace fossils in the development of the Central Carpathian Paleogene Basin in the Orava region. Occasional trace fossils findings from the Central Carpathian Paleogene formations in the Orava and others regions were referred by Plička (1987). Other specialized works on trace fossils from these formations from the Orava region were not published. Study of trace fossils is strongly influenced by the existence of well exposed outcrops within individual formations. The best exposed outcrops are situated in the basal Borové Formation as well as in the higher parts of Paleogene sequences – mainly in the Zuberec Formation. This preliminary study shows a relatively rich diversity of trace fossils associations across the Central Carpathian Paleogene Basin. We present new finds of trace fossils, within which we have classified 7 ichnogenera, 11 ichnospecies and 2 types of trace fossils, which were not closely systematically classified. Many trace fossils identified in the Orava region are typical for some palaeoenvironments, which are characterized by a specific lithology, nature of the substrate, dynamics of the environment, amount of nutrients and stability or fluctuations of oxygen in the bottom waters. The trace fossils assemblages reflect changes of depositional systems during the tectonic and sequence stratigraphic development of the basin. Early Eocene shallow-sea environment of the Borové Formation including the rocky coast, sandy dynamic littoral, transition - al and internal shelf zones are characterized by findings of traces of Entobia, Gastrochaenolites, Nummipera, Ophiomorpha and Skolithos. On the contrary, a significant deepening of the deposition environment during the Oligocene, documented by turbidite sedimentation of Zuberec and Biely Potok formations is characterised by findings of graphoglyptids ( Spirorhaphe, Nereites, Paleodiction, Protopaleodictyon, Megagrapton ) or traces of deposit feeders ( Arthrophycus, Chondrites, Planolites, Phycodes, Scolicia, Zoophycos).
Authors and Affiliations
V. Simo, D. Starek
Keywords
Related Articles
- EP ID EP204552
- DOI 10.7494/geol.2016.42.1.126
- Views 86
- Downloads 0
Arsenate substitution in synthetic hydroxylapatite – structural characterization of the Ca5(PO4)x(AsO4)3-xOH solid solution
Occurences of dissolved As in surface and ground waters and observed adverse health effects have emphasized the need for better understanding of reactions that govern As mobility. Precipitation of Ca apatites is quite of...
Mercury contamination of bottom sediments in water reservoirs of southern Poland
The aims of study were to an assessment of mercury concentration in bottom sediments collected from eight reservoirs located in south-eastern Poland. DMA-80 Mercury Analyzer was used for the analysis of concentration of...
Second occurrence of the new mineral harmunite CaFe2O4, Negev Desert, Israel
Harmunite (ideally CaFe2O4) was found in the natural environment for the first time in 2014 in pyrometamorpic larnite rocks of the Hatrurim Complex that lies near Jabel Harmun – moutain located in Judean Desert, Israel –...
Measurement of methane flux in the selected area of the Polish Outer Carpathians – preliminary research
Methane emissions associated with the hydrocarbon-generation process occurring in sedimentary basins are considered to be one of two types of geologic sources of methane emissions to the atmosphere. Current methane emiss...
Microhardness as a method for investigation of fossil resins
Natural fossil resins are products of deciduous and coniferous trees formed at least 40 million years ago. The fact that fossil resins survived until the present day is due to appropriate processes and conditions. One of...