The sand and gravel resources of the country north and west of Woodhall Spa, Lincolnshire : description of 1:25,000 resource sheet TF 16 and part of TF 17

The geological maps of the Institute of Geological Sciences, pre-existing borehole information, and 79 boreholes drilled for the Industrial Minerals Assessment Unit form the basis of the assessment of the sand and gravel resources of the area north and west of Woodhall Spa, Linconshire. The survey proved the existence of a broad buried valley beneath the Fenland which is infilled by an extensive deposit of sand and gravel up to 11.3 m in thickness. Potentially workable deposits on the flanks of the Fenland proved to be less extensive, discontinuous and much thinner. The deposits of the district are divided into 7 resource blocks, containing between 3.1 and 13.3 km2 of potentially workable sand and gravel. For each block the geology of the deposits is described, and the mineral-bearing area, the mean thickness 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 map.