Carbo-Permian pteridophyll leaf fragments from an amphibolite facies basement, Tauern Window, Austria |
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| Authors: | G. Franz V. Mosbruggr R. Menge |
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| Affiliation: | Fachgebiet Petrologie, Technische Universität Berlin, D 1000 Berlin 12, Germany;Institut für Paläontologie, Uniuersität Bonn, D 5300 Bonn, Germany;now at: Institut und Museum für Geologie und Paläontologie, Sigwartstr. 10, D 2400 Tübingen, Germany. |
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| Abstract: | Graphitic schists from the Pennine Basement, Tauern Window, Austria, contain fragments of pteridophyll leaves. They are preserved, despite the overall strong deformation and metamorphism at amphibolite facies conditions (˜ 525°C, 750°100 MPa), due to a particular strain path with volume loss by pressure solution. They were determined as cf. Callipteridium sp. indicating a Permo-Carboniferous age. This depositional age is similar to radiometric age data obtained for the intrusion of nearby metagranitoids, indicating either tectonic contacts between the metagranitoids and the graphite schists, or a very active and rapidly changing tectonic regime during the Hercynian event. |
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