The sand and gravel resources of the country around Lanark, Strathclyde region : description of 1:25,000 sheet NS 94 and part of NS 84

The geological maps of the Institute of Geological Sciences, eighty-six boreholes sunk for the Industrial Minerals Assessment Unit, and twenty-one shallow pits, together with data from the inspection of ten sand and gravel workings, form the basis of the assessment of sand and gravel resources in the Lanark area, Strathclyde Region. All deposits in the area which might be potentially workable for sand and gravel have been investigated and a simple statistical method used to estimate the volume. The reliability of the volume estimates is given at the symmetrical 95 per cent probability level. The 1:25 000 map is divided into seven resource blocks, six of which are assessed statistically and contain between 2.3 and 10.8 km2 of potentially workable sand and gravel. For the seventh resource block inferred assessments are offered for 0.28 km2 of mineral. The geology of the deposits is described and the mineral-bearing area, the mean thickness of overburden and mineral, and the mean grading are stated. Detailed borehole data are given. The geology, the outlines of the resource blocks and the position of boreholes used in the assessment are shown on the accompanying map.