Nowe dane o kambrze antykliny chęcińskiej (Góry Świętokrzyskie)
Abstract
NEW DATA ON THE CAMBRIAN OF THE CHĘCINY ANTICLINE (HOLY CROSS MTS, CENTRAL POLAND)
Summary
The lithology of rocks, occurrence of trilobites and trace fossils suggest that the Cambrian rocks of the Chęciny Anticline belong to the Ociesęki Sandstone Formation and to the Holmia-Schmidtiellus Zone of the Lower Cambrian (Orłowski, 1989, 1992). The rocks are the equivalent of the member A within the Ociesęki Sandstone Formation, which was recognized in the neighbouring area of the Dyminy Anticline (Orłowski & Mizerski, 1996), most probably the equivalent of the lower part of the member A, just visible only on the area of Chęciny Anticline. These rocks correspond to mudstones and siltstones exposed on the SE slope of the Sterczyna Hill, on the stratotype area at the Ociesęki Range. The trilobites mentioned by Czarnocki (1947) and in this publication suggest the Holmia-Schmidtiellus Zone of the Lower Cambrian (Orłowski, 1985). The trilobite trace fossils are not as in the Ociesęki area but they are as common similar and suggest the lower part of the Ociesęki Sandstone Formation (Orłowski, 1989). The earlier suggestion (Orłowski, 1975; Głazek et al., 1981) concerning the existence of the Czarna Shale Formation in the Chęciny Anticline was not confirmed. The rocks of this Formation in the SW part of the Holy Cross Mountains might be situated, under the cover of younger rocks, more to the south than the Cambrian outcrops of the Chęciny Anticline.
Summary
The lithology of rocks, occurrence of trilobites and trace fossils suggest that the Cambrian rocks of the Chęciny Anticline belong to the Ociesęki Sandstone Formation and to the Holmia-Schmidtiellus Zone of the Lower Cambrian (Orłowski, 1989, 1992). The rocks are the equivalent of the member A within the Ociesęki Sandstone Formation, which was recognized in the neighbouring area of the Dyminy Anticline (Orłowski & Mizerski, 1996), most probably the equivalent of the lower part of the member A, just visible only on the area of Chęciny Anticline. These rocks correspond to mudstones and siltstones exposed on the SE slope of the Sterczyna Hill, on the stratotype area at the Ociesęki Range. The trilobites mentioned by Czarnocki (1947) and in this publication suggest the Holmia-Schmidtiellus Zone of the Lower Cambrian (Orłowski, 1985). The trilobite trace fossils are not as in the Ociesęki area but they are as common similar and suggest the lower part of the Ociesęki Sandstone Formation (Orłowski, 1989). The earlier suggestion (Orłowski, 1975; Głazek et al., 1981) concerning the existence of the Czarna Shale Formation in the Chęciny Anticline was not confirmed. The rocks of this Formation in the SW part of the Holy Cross Mountains might be situated, under the cover of younger rocks, more to the south than the Cambrian outcrops of the Chęciny Anticline.