The oldest Lower-Badenian bryozoan event in the Carpathian Foredeep from bore-holes in Přemyslovice (PY-1 to PY-4)
Abstract
Four shallow boreholes were carried out in the village Poemyslovice (PY-1 to PY-4), penetrating Lower Badenian sediments lying on the Culmian basement. A total of 9 samples were taken, which yielded rich Foraminifera and Bryozoa fauna.
Bryozoans represent the oldest known assemblage from the Carpathian Foredeep and boreholes PY-1 and PY-4 hit the basement of bryozoan event. The basement is very rare and up to now has been reported in only three other locations in the Central Paratethys.
Paleoecological analysis indicates a marine environment with normal salinity, with a depth of about 100 m, with the presence of algae and a reduction in the oxygen content of the sediment. The bryozoan event was linked to the inux of warmer water, with a lower content of organic matter, to the Central Paratethys, along with higher energy of water during the transgression.