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1 Geological Survey of Norway, N-7491 Trondheim, Norway
2 Institute of Geology, University of Oslo, 0316 Oslo, Norway
Late orogenic, Early to Middle Devonian extension in the Scandinavian Caledonides was unidirectional in western Norway. New data from two detachment zones (Høybakken and Kollstraumen) north of the Møre-Trøndelag Fault Complex show that bidirectional, opposed, orogen-parallel extension dominated in this region. At this time, the fault complex acted as a transfer zone for the Høybakken detachment. Extension and uplift in central Norway triggered significant magmatic activity, in contrast to the lack of granite intrusions during exhumation of western Norway.
Key Words: Norway • Devonian • extension • detachment
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