The late Permian dolomitic limestones (dolostones), which form an almost continuous outcrop from north Nottinghamshire to the Durham coast at Teeside, have been an important source of industrial minerals for many centuries. They have been quarried extensively for building stone, aggregate and lime for agricultural, industrial and chemical processes (see Buist & Ineson 1992) The limestones, because of their magnesium-rich carbonate mineralogy are perhaps still best known by their former geological name the (Lower) Magnesian Limestone. However, in Yorkshire and Nottinghamshire the limestones are now named, by geologists, the Cadeby Formation (Smith et al. 1986; Fig. 1). Along much of its length, the outcrop is pock-marked by small quarries and lime pits, many now disused and some infilled with waste. Currently there are three quarries producing building stone from the formation in Yorkshire, namely Highmoor, Hazel Lane and Cadeby quarries (Map 1). Many of the most famous quarries of the Tadcaster (Thevesdale) area Smaw’s, Jackdaw Crag, Terry Lug, Hazelwood etc have long ceased operations (Fig. 1)
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