Basins filled with the continental upper Paleozoic rocks in the Bohemian Massif represent graben facies deposited in a system of half-grabens and grabens that follow the Precambrian lineaments or strike-slip faults. These rocks were laid down contemporaneously with an intermittent taphrogenic faulting over the updomed Bohemian Massif. Further uplift and repeated faulting in portions of the area of the upper Paleozoic continental sedimentation are marked by graben-rift formation on a regional scale. As a result, still-active structures constitute the central European part of the intercontinental belt of the world rift system of lilies (1969). The graben-rift structures of the Bohemian Massif are associated with Westphalian rhyolites, Autunian melaphyres, and Miocene-Pleistocene alkaline basalts.
Because of the taphrogenic character of graben-rift tectonics and volcanicity in the Bohemian Massif, previous views that Vari-scan and Alpine orogenies are responsible for these phenomena are not supported.