The Callovian succession (excluding Cornbrash) in the western and northern parts of the Yorkshire Basin

Abstract

A description is given of the Kellaways Rock succession in the Howardian, Hambleton, western Tabular and Cleveland Hills, and of the limited Langdale Beds and Hackness Rock exposures running through the centre of this region. Data from this paper and from the author's previous work on the Callovian are combined to give a synthesis of conditions and events during this major part of the Callovian Stage in Yorkshire. Chamosite oolite forms an important constituent of the Yorkshire Callovian, and its mode of formation is discussed in detail. Three cycles of sedimentation can be recognised, with marine influence in each cycle increasing upwards, and culminating in the lowest two cycles in periods of uplift and erosion, now seen to have affected most of the Yorkshire Basin.