Budowa geologiczna płaszczowiny magurskiej w strefie przypienińskiej w świetle wyników badań uzyskanych z wiercenia Nowy Targ PIG l
Abstract
GEOLOGY OF MAGURA NAPPE IN THE PERI-PIENINY ZONE IN LIGHT OF THE NOWY TARG PIG I BOREHOLE
Summary
The Krynica Subunit occupies the southernmost position in tectonic subdivision of the Magura Nappe. Its geological structure was satisfactory by recognized only in the elevated areas of the Żeleżnica, Gorce and Beskid Sądecki ranges. Here crop out rocks representing the continouos sedimentation from the Cenomanian to the Late Eocene. The stratigraphical column is formed by following elements: variegated shales, Ropianka beds, Szczawnica beds, Zarzecze beds, Kowaniec beds and Magura sandstones. Reverse situation concerns the part of the Krynica subunit hidden under the thick Neogene and Quaternary deposits, in depression at the front of Pieniny Klippen Belt between Nowy Targ and Czarny Dunajec. The geological structure of the subunit is poorly known. Its sediments crop out rarily in isolated exposures of the Nowy Targ region (13, 14, 16). These are the youngest sediments of the subunit, the Malcov beds. The occurrence of the Malcov beds in the area was confirmed by results of the borehole Nowy Targ PIG 1 located about 1 km N of the Pieniny Klippen Belt. The Malcov beds recovered in the borehole occur in two varieties: shaly psammitic and marly-shaly-psammitic. They are strongly tectonically disturbed, and several scales were identified. The angle of overthrust surfaces is very steep (70 - 85°). Within individual scales, the inclination of Malcov beds is also high. Both, overthrust surfaces and bed dips inclined toward the south. Below the Malcov beds at the depth 3675 m appear Szczawnica beds underlain by Ropianka beds interval 3722 - 3853. The contact between Malcov and Szczawnica beds is disturbed and tectonic cracks and mirrors abound. The lack of Eocene sediments of the Magura Formation between Malcov and Szczawnica beds, suggests, that discussed Szczawnica beds may belong to a different, tectonic unit, that contacts Pieniny Kippen Belt. This may be the Grajcarek unit, which is scattered along the front of Pieniny Klippen Belt. To the same unit may belong Szczawnica and Ropianka beds in the borehole as the latter partly resemble the Jarmuta beds that is a facies of the Pieniny Klippen Belt deposits.
Summary
The Krynica Subunit occupies the southernmost position in tectonic subdivision of the Magura Nappe. Its geological structure was satisfactory by recognized only in the elevated areas of the Żeleżnica, Gorce and Beskid Sądecki ranges. Here crop out rocks representing the continouos sedimentation from the Cenomanian to the Late Eocene. The stratigraphical column is formed by following elements: variegated shales, Ropianka beds, Szczawnica beds, Zarzecze beds, Kowaniec beds and Magura sandstones. Reverse situation concerns the part of the Krynica subunit hidden under the thick Neogene and Quaternary deposits, in depression at the front of Pieniny Klippen Belt between Nowy Targ and Czarny Dunajec. The geological structure of the subunit is poorly known. Its sediments crop out rarily in isolated exposures of the Nowy Targ region (13, 14, 16). These are the youngest sediments of the subunit, the Malcov beds. The occurrence of the Malcov beds in the area was confirmed by results of the borehole Nowy Targ PIG 1 located about 1 km N of the Pieniny Klippen Belt. The Malcov beds recovered in the borehole occur in two varieties: shaly psammitic and marly-shaly-psammitic. They are strongly tectonically disturbed, and several scales were identified. The angle of overthrust surfaces is very steep (70 - 85°). Within individual scales, the inclination of Malcov beds is also high. Both, overthrust surfaces and bed dips inclined toward the south. Below the Malcov beds at the depth 3675 m appear Szczawnica beds underlain by Ropianka beds interval 3722 - 3853. The contact between Malcov and Szczawnica beds is disturbed and tectonic cracks and mirrors abound. The lack of Eocene sediments of the Magura Formation between Malcov and Szczawnica beds, suggests, that discussed Szczawnica beds may belong to a different, tectonic unit, that contacts Pieniny Kippen Belt. This may be the Grajcarek unit, which is scattered along the front of Pieniny Klippen Belt. To the same unit may belong Szczawnica and Ropianka beds in the borehole as the latter partly resemble the Jarmuta beds that is a facies of the Pieniny Klippen Belt deposits.