Conodont biostratigraphy of the Devonian and Carboniferous rocks in the central part of the Małopolska Massif
Journal Title: Biuletyn Państwowego Instytutu Geologicznego - Year 2015, Vol 462, Issue 462
Abstract
The conodont study was performed on Devonian and lowermost Carboniferous carbonate rocks from the Pągów IG 1 and Węgrzynów IG 1 boreholes located in the central part of the Małopolska Massif. Based on the conodont biostratigraphy, sediments assigned to the Givetian, Frasnian and Famennian (lower [i]falsiovalis[/i]–upper [i]postera [/i]zones) and to the Tournaisian and Visean ([i]delicatus[/i]–[i]texanus [/i]zones) were examined in the Węgrzynów section. The Pągów section is represented by Frasnian and Famennian sediments ascribed to the [i]jamieae[/i]–upper [i]rhenana [/i]and lower [i]expansa [/i]zones. The incomplete conodont zone succession in the Pągów and Węgrzynów sections indicates the presence of stratigraphic gaps. In Pągów, these hiatuses were pinpointed in the Upper Devonian and between the Devonian and the Carboniferous, whereas in Węgrzynów at the Devonian–Carboniferous boundary. In the Węgrzynów area, deposition of the Upper Devonian sediments occurred in a basin, showing much greater subsidence than that in the Pągów area. In the Late Devonian sediments of the Małopolska Massif and neighbouring areas of much the same biostratigraphic intervals are similar in terms of lithologic and biofacies characteristics.
Authors and Affiliations
Jan MALEC
Keywords
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