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Comments on ‘Evidence for a Caledonian orogeny in Poland’ by J. D. Johnston, J. A. Tait, J. H. Oliver and F. G. Murphy
Published online by Cambridge University Press: 03 November 2011
Extract
In a recent paper Johnston et al. (1994) have provided an innovative interpretation of the tectonostratigraphic relationships between distinct terranes juxtaposed along the Intra–Sudetic Fault in the Sudetes Mountainsof the Polish Variscides. They identified this fault as a major crustal fracture between Gondwana and Baltica, rramed the Tornquist Suture, resulting from the closure of the Tornquist Sea during the Caledonian orogeny. This interpretation is based on new U/Pb ages on zircon and titanite from igneous and metamorphic rocks (Oliver et al. 1993), field observations and reassessment of pre–existing data. Previously, the Sudetes were generally thought to haveformed during the Hercynian orogeny, although Caledonian age deformation was also inferred (Oberc 1977, 1986; Don 1984, 1986, 1990).
- Type
- Research Article
- Information
- Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 86 , Issue 3 , 1995 , pp. 227 - 230
- Copyright
- Copyright © Royal Society of Edinburgh 1995
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