The Tylawa Limestones – a regional marker horizon in the Lower Oligocene of the Paratethys: diagnostic characteristics from the type area

Authors

  • Agnieszka Ciurej Instytut Nauk Geologicznych PAN Ośrodek Badawczy w Krakowie ul. Senacka 1, 31-002 Kraków
  • Grzegorz Haczewski Pedagogical University of Krakow, Podchorążych 2, PL-30-084, Kraków

DOI:

https://doi.org/10.7306/gq.1058

Keywords:

Tylawa Limestones, Outer Carpathians, coccolith limestone, chronohorizons, Oligocene

Abstract

Three units of laminated coccolith limestone are used as regional chronohorizons in the Oligocene of the Outer Carpathians. Two of them – the Tylawa Limestones and the Jasło Limestone display a similar type of lamination and their discrimination is in some cases problematic. We provide a detailed mesoscopic and microscopic lithological description of the Tylawa Limestones from the type locality at Tylawa and from Rudawka Rymanowska – the best exposure in the Polish Carpathians. The finely laminated limestone layers are up to 5.5 cm thick and are dispersed through a section more than 100 m thick. They are grouped in clusters. They differ from the younger Jasło Limestone in: (1) an absence of foraminifers, (2) a mass occurrence of Reticulofenestra ornata Müller, (3) the presence of voids after pennate diatoms, (4) dark laminae which are more pronounced than in the Jasło Limestone. 

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Published

2012-11-16

Issue

Vol. 56 No. 4 (2012)

Section

Articles

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