Articles | Volume 10, issue 1
https://doi.org/10.5194/se-10-117-2019
https://doi.org/10.5194/se-10-117-2019
Research article
 | 
17 Jan 2019
Research article |  | 17 Jan 2019

Anticlockwise metamorphic pressure–temperature paths and nappe stacking in the Reisa Nappe Complex in the Scandinavian Caledonides, northern Norway: evidence for weakening of lower continental crust before and during continental collision

Carly Faber, Holger Stünitz, Deta Gasser, Petr Jeřábek, Katrin Kraus, Fernando Corfu, Erling K. Ravna, and Jiří Konopásek

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Short summary
The Caledonian mountains formed when Baltica and Laurentia collided around 450–400 million years ago. This work describes the history of the rocks and the dynamics of that continental collision through space and time using field mapping, estimated pressures and temperatures, and age dating on rocks from northern Norway. The rocks preserve continental collision between 440–430 million years ago, and an unusual pressure–temperature evolution suggests unusual tectonic activity prior to collision.