The sedimentology and stratigraphy of the Early Triassic Sherwood Sandstone Group in the East Irish Sea and Cheshire Basins of NW England

Abstract

The existing stratigraphic nomenclature applied to the Early Triassic Sherwood Sandstone Group in NW England has resulted from more than 150 years of geological investigation but is characterised by a stratigraphic system that fails to allow for variations in lithology and sedimentary facies. The main objective of this thesis has been to erect an alternative lithostratigraphy using an improved understanding of continental depositional systems, a consistent facies based description of the rocks and analysis of their detrital composition.