Paleomiąższości i litofacje wapienia muszlowego i kajpru dolnego oraz paleotektonika triasu środkowego na Niżu Polskim
Year: 2013
Type: article
Abstract: Na podstawie map paleomiązszości i litofacji utworow gornego pstrego piaskowca, wapienia muszlowego i kajpru dolnego przeprowadzono analize paleotektoniczną, z ktorej wynika, ze ruchy tektoniczne decydujące o paleotektonice triasu środkowego mialy miejsce glownie w koncowym etapie rozwoju basenu - w wapieniu muszlowym gornym i kajprze dolnym. PALAEOTHICKNESS AND LITHOFACIES OF THE MUSCHELKALK AND LOWER KEUPER AND THE MIDDLE TRIASSIC PALAEOTECTONICS IN POLISH LOWLAND Two palaeothickness and lithofacies maps of the Muschelkalk and Lower Keuper have been elaborated (Figs 1, 2). In the Lower and Middle Muschelkalk the axis of the sedimentary basin was sub-parallel and lithofacies pointed to a shallow marine basin with the carbonate sediments predominating. Terrigenous material was transported to the basin from the north and north-east (Fig. 1). In the Upper Muschelkalk and Lower Keuper the axis of the basin changed its direction from parallel to NW-SE, and clastic material was shed mainly from the north and east (Fig. 2). As a result of the analysis of the above mentioned maps and the palaeothickness and lithofacies maps of the Upper Buntsandstein, the palaeotectonic map of the Middle Triassic (Fig. 3) has been made, comprising in a chronostratigraphic sense the Anisian and Ladinian (Tab. I). A series of structural positive and negative elements was distinguished in the map. It is concluded that the tectonic movements, influencing the Middle Triassic palaeotectonics, took place in the final stage of the evolution of the basin namely in the Upper Muschelkalk and Lower Keuper. It also seams that the connection between the Middle Triassic epicontinental basin in Poland and the Tethyan basins existed in the Krakow-Tarnow Depression area, and that the Moravian Gate was then only an embayment.
Source: Geological Quarterly
Author: Irena Gajewska
Language: Polish
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W1925017487