Popis: |
The region discussed in this paper is characterized by strongly varying thicknesses of the earth's crust, and the occurrence of five different blocks which are separated by vertical zones of deep faults. The majority of these faults originated at the beginning of the Paleozoic. Seismological studies have revealed that the Mohorovicic discontinuity shows a very complicated relief. As the crust was in an isostatic balance while the thickness was comparatively small, at the end of the Paleogene, very strong movements must have taken place during the Neogene-Quaternary period. A close relation was found between the character of the latest block movements and the thickness of the crust. A thick crust indicates that the block was subjected to intense ascending movements; a thin crust is a witness of descending movements. There is also a thickness — time relation, because areas that consolidated earlier were less uplifted during the Neogene-Quaternary period, resulting in thinner crusts than those in areas that consolidated later. |