Late orogenic, Early to Middle Devonian extension in the Scandinavian Caled
onides was unidirectional in western Norway. New data from two detachment z
ones (Hoybakken and Kollstraumen) north of the More-Trondelag Fault Complex
show that bidirectional, opposed, orogen-parallel extension dominated in t
his region. At this time, the fault complex acted as a transfer zone for th
e Hoybakken detachment. Extension and uplift in central Norway triggered si
gnificant magmatic activity, in contrast to the lack of granite intrusions
during exhumation of western Norway.