A proposal on lithostratigraphy of Cenozoic volcanic rocks in Eastern Bohemia


Vladimír Cajz, Vladislav Rapprich, Petr Schnabl, Zoltán Pécskay

Geoscience Research Reports 42, 2009 (GRR for 2008), pages 9–14

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This paper proposes lithostratigraphy of Cenozoic basaltic volcanism of the Jičín Volcanic Field (Eastern Bohemia). Two formations are distinguished: Trosky Fm. (Upper Miocene; 15.7-18.3/24.6? Ma) and Kozákov Fm. (Lower Pliocene; 4.6-5.2Ma). Both of them are represented by products of Strombolian- or phreatomagmatic-type volcanic activity with preserved relics of cinder/tuff cones and lava-filled maar craters (Trosky Fm.) and lavas with their feeder (Kozákov Fm.). Accuracy of radiometric data of the volcanic activity is evaluated using results of paleomagnetic research