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Williams, D. M. (1976) Clastic dykes from the Precambrian Porsangerfjord Group, North Norway. Geological Magazine, 113 (2) 169-176 doi:10.1017/s0016756800036475

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Reference TypeJournal (article/letter/editorial)
TitleClastic dykes from the Precambrian Porsangerfjord Group, North Norway
JournalGeological Magazine
AuthorsWilliams, D. M.Author
Year1976 (March)Volume113
Issue2
PublisherCambridge University Press (CUP)
DOIdoi:10.1017/s0016756800036475Search in ResearchGate
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Mindat Ref. ID251140Long-form Identifiermindat:1:5:251140:9
GUID0
Full ReferenceWilliams, D. M. (1976) Clastic dykes from the Precambrian Porsangerfjord Group, North Norway. Geological Magazine, 113 (2) 169-176 doi:10.1017/s0016756800036475
Plain TextWilliams, D. M. (1976) Clastic dykes from the Precambrian Porsangerfjord Group, North Norway. Geological Magazine, 113 (2) 169-176 doi:10.1017/s0016756800036475
In(1976, March) Geological Magazine Vol. 113 (2) Cambridge University Press (CUP)
Abstract/NotesSummaryClastic dykes are described from a late Precambrian sequence of shallow water sediments — the Porsangerfjord Group of Finnmark, North Norway. The dykes are from one stratigraphic member of the Group and only occur where this member outcrops in a zone where sedimentation was thought to have been affected by recurrent earthquake shock. The dykes consist of poorly defined sandstone clasts in a muddy matrix. They exhibit no significant internal sedimentary structures. It is suggested that the dykes were intruded due to remobilization of sediment affected by a combination of tectonic shock and hydrostatic load. The dykes bear no genetic relationship to tectonic structures (cleavage and jointing) and evidence suggests that dewatering was virtually complete before the formation of the first cleavage.


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