The Tylawa Lime stones -a re gional marker ho ri zon in the Lower Oligocene of the Paratethys: di ag nos tic char ac ter is tics from the type area Three units of lam i nated coccolith lime stone are used as re gional chronohorizons in the Oligocene of the Outer Carpathians. Two of them -the Tylawa Lime stones and the Jasło Lime stone -dis play a sim i lar type of lam i na tion and their dis crim i na tion is in some cases problem atic. We pro vide a de tailed mesoscopic and mi cro scopic lithological de scrip tion of the Tylawa Lime stones from the type lo cal ity at Tylawa and from Rudawka Rymanowska -the best ex po sure in the Pol ish Carpathians. The finely lam i nated lime stone lay ers are up to 5.5 cm thick and are dis persed through a sec tion more than 100 m thick. They are grouped in clus ters. They dif fer from the youn ger Jasło Lime stone in: (1) an ab sence of foraminifers, (2) a mass oc cur rence of Reticulofenestra ornata Müller, (3) the pres ence of voids af ter pennate di a toms, (4) dark laminae which are more pro nounced than in the Jasło Lime stone.
Agnieszka Ciurej, In sti tute of Geo log i cal Sci ences, Pol ish Acad emy of Sci ences,
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