Geological history and significance of a laminated and slumped unit in the Carboniferous Limestone of the Monsal Dale region,Derbyshire

A laminated and slumped limestone bed from the Carboniferous Limestone of Derbyshire, known as the Rosewood Marble, is described in detail. The laminations comprise alternations of micrite and dolomite, the dolomite laminae originally being fine grainstones. The bed was deposited on a slope and slipping and sliding gave rise to tensional features such as pull-apart structures and compressional features such as slump folds. Evidence suggests that the palaeoslope was inclined towards the south-southeast and caused by synsedimentary movements of the Longstone Edge monocline and/or the Priestcliffe syncline. Diagenetic features described include cementation, dolomitization, calcite pseudomorphs after replacement anhydrite and silicification.