Titel
Deformation of the Dachstein Limestone in the Dachstein thrust sheet (Eastern Alps, Austria)
Autor*in
Diethard Sanders
Dept. of Geology , Univ. of Innsbruck
Abstract
Deformation affecting the Upper Triassic Dachstein Limestone has been analyzed in the Dachstein thrust sheet, the uppermost thrust unit of the central Northern Calcareous Alps (Eastern Alps). Different scales of deformation are discussed, from kilometer-scale thrusting down to folds in the order of tens of meters to meters. Observations are based on both conventional outcrop observations and on digital fieldwork performed on drone-captured virtual outcrops and on GoogleMaps 3D terrain renderizations. The structures observed were formed at different times and document the following events: 1) Late Triassic syn-depositional instability and slumping; 2) Late Triassic syn-depositional growth of the Hallstatt diapir; 3) Late Triassic syn-depositional, salt-driven, extensional faulting; 4) Jurassic-age re-activation of extensional faults; 5) (presumably) Early Cretaceous shortening in both east-west and north-south directions; and 6) (presumably) Late Cretaceous extensional re-activation of faults. The structures and their origin have a bearing on the interpretation of the tectonic evolution of the Dachstein thrust sheet, highlighting the potential relevance of salt tectonics in controlling its structure.
Stichwort
Dachstein Limestonesoft-sediment deformationtectonic deformationsalt tectonicsEo-Alpinevirtual outcrops
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1792353
Erschienen in
Titel
Austrian Journal of Earth Sciences
Band
115
Ausgabe
1
ISSN
2072-7151
Erscheinungsdatum
2022
Seitenanfang
167
Seitenende
190
Publication
Austrian Geological Society (OGG)
Erscheinungsdatum
2022
Zugänglichkeit
Rechte
Rechteangabe
© 2022 Oscar Fernandez, Bernhard Grasemann, Diethard Sanders
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