The sand and gravel resources of the country around Kettering and Wellingborough, Northamptonshire : description of 1:25,000 sheets SP 97 and parts of SP 87 and TL 07; and SP 86 and 96

The geological maps of the Institute of Geological Sciences, pre-existing borehole information and 150 boreholes drilled for the Industrial Minerals Assessment Unit form the basis of the assessment of sand and gravel resources of the country around Kettering and Wellingborough, in parts of Northamptonshire, Cambridgeshire and Bedfordshire. All the deposits in the area which might be potentially workable for sand and gravel have been investigated, and a simple statistical method has been used to estimate the volume. The reliability of the volume estimates is given at the symmetrical 95 per cent probability level. The two 1:25 000 resources sheets are divided into four resource blocks containing between 5.4 and 19.2 km2 of sand and gravel. For each block, the geology of the deposits is described and the mineral-bearing area, the mean thicknesses of overburden and mineral and the mean gradings are stated. Detailed borehole data are also given. The geology, the position of the boreholes and the outlines of the resource blocks are shown on the accompanying maps.