The limestone and dolomite resources of the country north and west of Ashbourne, Derbyshire : description of 1:25,000 sheet SK 15 and parts of 04, 05 and 14

The study of samples from 25 cored boreholes, 56 major sections and a large number of small exposures, together with information from the records and geological maps of the Institute, form the basis of the assessment of limestone and dolomite resources in the country lying to the north and west of Ashbourne, Derbyshire. The limestones have been classified on the basis of their calcium carbonate content, and the accompanying 1:25 000 resource map shows the distribution of the recognised categories of limestone at or near to the surface. Horizontal sections constructed from the borehole data and from knowledge of the regional geology indicate the categories likely to be encountered at depth. Three resource blocks have been outlined and for each, the geology, the categories of limestone and the occurrences of other rocks are described. The results of investigations of chemical and mechanical properties are presented with outline borehole logs and the data are statistically analysed for the stratigraphical units described.