The nappe area Sogn-Bergen, Norwegian Caledonides

1980 ◽  
Vol S7-XXII (3) ◽  
pp. 284-286 ◽  
Author(s):  
Helge Askvik
Keyword(s):  
Norwegian Caledonides

scholarly journals Notes on Ordovician graptolites, nautiloids and trace fossils from Lånke, Central Norwegian Caledonides

2020 ◽  
Author(s):  
Morten Smelror ◽  
Terje Solbakk ◽  
Bjørn Ivar Rindstad ◽  
Helle Vangen Stuedal ◽  
Karstein Hårsaker
Keyword(s):  
Trace Fossils ◽  
Norwegian Caledonides

Evidence for an incipient early Caledonian (Cambrian) orogenic phase in southwestern Norway

1983 ◽  
Vol 120 (6) ◽  
pp. 607-612 ◽  
Author(s):  
H. Furnes ◽  
H. Austrheim ◽  
K. G. Amaliksen ◽  
J. Nordas
Keyword(s):  
Continental Crust ◽  
Early Phase ◽  
Island Arc ◽  
Volcanic Complex ◽  
Northern Norway ◽  
Middle Ordovician ◽  
Minimum Age ◽  
Norwegian Caledonides

Summary. Quartz-keratophyres from an ensimatic island arc on Bømlo, southwest Norwegian Caledonides, resting on the Lykling ophiolite, have yielded a Rb/Sr whole rock age of 535 ± 46 Ma. This Cambrian age, which is a minimum age of formation for the ophiolite, indicates an early phase of subduction, corresponding with the orogenic activity known from northern Norway, i.e. the Finnmarkian. Before Middle Ordovician time, the ophiolite and ensimatic arc had been obducted onto continental crust and deformed, as they are unconformably overlain by a volcanic complex of subaerial rhyolites and andesites which have yielded Rb/Sr whole rock ages of 464 ± 16 and 468 ± 23 Ma respectively.

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