Quaternary Tectonic Activity of the Central Part of the Polish Carpathian Foredeep, Evidences from Archaeological Open Site

The fossil graben and associated with it the normal faults and joints within the Vistulian and Holocene sediments are the object of considerations here. These structures were observed in the ar-chaeological open site at Brzezie, in the central part of the Polish Carpathian Foredeep (Fig. 1A). The normal faults cut the Pleistocene gleyed loess, laminated loess, Eoholocene buried soil and the lower part of the Mezoho-locene deluvium that includes an archaeological artefacts from the Neolith and early Bronze Age (Fig. 1B). These structures die out within the middle and upper part of the Neoholocene delu-vium including archaeological artefacts from the Lusatian culture. The normal faults strike mostly NNE-SSW and dip steeply about 65–850 (Fig. 1C). Some of them, the master normal faults, bound the fossil graben (Fig. 1B). The surfaces of the normal faults are slightly striated. The fault-slip analysis shows that the maximu