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Nordfjord-Sogn Detachment
Zone of deformed rocks in Norway / From Wikipedia, the free encyclopedia
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The Nordfjord—Sogn Detachment (NSD) is a major extensional shear zone in Norway up to 6 km in thickness, which extends about 120 km along strike from Nordfjord to Sognefjord, bringing Devonian continental coarse clastic sedimentary rocks into close contact with eclogite facies metamorphic rocks of the Western Gneiss Region. It formed towards the end of the Caledonian Orogeny and was mainly active during the Devonian. It has an estimated displacement of at least 70 km and possibly as much as 110 km.[1] It was reactivated during the Mesozoic and may have influenced the development of fault structures in the North Sea rift basin.[2]
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