Deformation of the Upper Cretaceous Chalk at Selwicks Bay, Flamborough Head, Yorkshire: its significance in the structural evolution of north-east England and the North Sea Basin

SUMMARY null Four deformation phases (D1–4) can be recognized in the Upper Cretaceous Chalk of Selwicks Bay. null D1 ENE–WSW compression formed gentle NNW–SSE buckles in Selwicks Bay, with localized overturned folds and minor thrusts to the south. Regionally, D1 is correlated with Laramide sinistral slip on the Dowsing Fault, inversion of the Sole Pit Basin, and N–S to NNE–SSW folding in the Cleveland Basin. Subsequent D2 extensional fracturing...