The sand and gravel resources of Strathallan, Tayside Region : description of parts of 1:25,000 sheets NN 80, 81, 90 and 91

The geological maps of the Institute of Geological Sciences, fifty-five boreholes and twenty-five shallow pits sunk for the Industrial Minerals Assessment Unit, together with pre-existing borehole information and data from one working pit, form the basis of the assessment of sand and gravel resources in Strathallan, Tayside 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 1:25000 map is divided into five resource blocks, four of which are assessed statistically and contain between 3.4 and 10.6km2 of potentially workable sand and gravel. For the fifth resource block inferred assessments are offered for 7.0km2 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 sample point data are given. The geology, the outlines of the resource blocks and the position of sample points used in the assessment are shown on the accompanying resource map.