Wpływ spękań ciosowych na kształtowanie przebiegu dolin rzecznych zachodniego Podhala

The directions of joints, measured in bedrock outcrops in stream channels, have been compared with the directions of the low-order valleys The results indicate that upper courses of all studied valleys are consistent with the orientation of dominant joint system This correlation can be an evi- dence of valley-forming process along joints of diagonal system In contrast to the upper courses, lower courses of most of the valleys are inconsistent with diagonal joint system According to the research results, the valley directions changed in the course of their development, especially during the Tatra glaciations, when lower courses of the valleys were filled with fluvio-glacial material