The sand and gravel resources of the country north of Newmarket, Cambridgeshire and Suffolk : description of 1:25,000 sheet TL 67 and part of TL 66

The geological maps of the Institute of Geological
Sciences, pre-existing borehole information, and 97 boreholes
drilled for the Industrial Minerals Assessment Unit
form the basis of the assessment of the sand and gravel
resources of the country north of Newmarket.
All the deposits in the district that 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 mineral-bearing ground is divided into four
resource blocks, containing between 9.7 and 20.7 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 map.