The sand and gravel resources of the country around Redgrave, Suffolk : description of 1:25,000 sheet TM 07 and part of TM 08

The geological maps of the Institute of Geological
Sciences, pre-existing borehole information, and 118
boreholes drilled for the Industrial Minerals Assessment
Unit form the basis of the assessment of the sand and
gravel resources of the country around Redgrave,
Suffolk.
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 1:25 000 map is divided into six resource blocks,
containing between 11.2 and 22.9 km2 of 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.