Struktura zachodniego zakończenia masywu tatrzańskiego
Abstract
Structure of the western termination of the Tatra massif
The massif o f the Tatra Mountains, uplifted during the Neogene structural remodelling of the Inner Carpathians, is bounded on all sides by fault zones which define its rhomboidal outline. The northwestern termination of the Tatra Mountains is a part of the Myjava Lineament (Doktór et al., 1985) which extends from the Vienna Basin to the town of Stalowa Wola in southeast Poland. This lineament is related to a Iranspression fault (Pospisil et al., 1990). This paper presents the structural evolution o f the western termination o f the Tatra Mountains from Early Badenian through Quaternary times. Sinistral movement along the Myjava Lineament resulted in the formation of the Podhale and Skoruszyna Basins in Early Badenian time (Late Styrian phase) and then of the Orava Depression. Dextral transpressional movement along this line occurred during the Rhodanian phase (late Pliocene); backward thrusting of fragments of the Low-Tatric Nappes on the already elevated Tatra Massif and the uplift of the Chocske Vrchy range were related to this movement. The Myjava Fault is one of the youngest active fault zones in the Western Carpathians.
The massif o f the Tatra Mountains, uplifted during the Neogene structural remodelling of the Inner Carpathians, is bounded on all sides by fault zones which define its rhomboidal outline. The northwestern termination of the Tatra Mountains is a part of the Myjava Lineament (Doktór et al., 1985) which extends from the Vienna Basin to the town of Stalowa Wola in southeast Poland. This lineament is related to a Iranspression fault (Pospisil et al., 1990). This paper presents the structural evolution o f the western termination o f the Tatra Mountains from Early Badenian through Quaternary times. Sinistral movement along the Myjava Lineament resulted in the formation of the Podhale and Skoruszyna Basins in Early Badenian time (Late Styrian phase) and then of the Orava Depression. Dextral transpressional movement along this line occurred during the Rhodanian phase (late Pliocene); backward thrusting of fragments of the Low-Tatric Nappes on the already elevated Tatra Massif and the uplift of the Chocske Vrchy range were related to this movement. The Myjava Fault is one of the youngest active fault zones in the Western Carpathians.