The sand and gravel resources of the country around Chichester and north of Bognor Regis, Sussex : description of 1:25,000 sheet SU 80 and 90

The geological maps of the Institute of Geological
Sciences, pre-existing borehole information and 138
boreholes drilled for the Industrial Minerals Assessment
Unit (IMAU) form the basis for the assessment of the
sand and gravel resources of the country around
Chichester and north of Bognor Regis, Sussex.
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 eight
resource blocks, containing between 7.5 and 16.1 km2 of
potentially workable 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 of the mineral are stated;
detailed borehole data are also given. The geology, the
positions of the boreholes and the outlines of the
resource blocks are shown on the accompanying resource
map.