Some features of tectonic deformation of Old Red Sandstone sediments on Hitra, west central Norway.

Abstract

Minor tectonic structures affecting Downtonian Old Red Sandstone sediments on Hitra indclude folds parasitic to a major syncline, and an associated axial surface spaced cleavage. The cleavage is most prominent in mudstones, and appears to represent dissolution foliae; no neocrystallization has been detected. In these rocks carbonate nodular concretions show evidence of mechanical rotation from bedding-parallelism towards the plane of the cleavage. Younger structures are represented by crenulations and kink bands.