On 08/12/16 20:48, DJC wrote:
On 08/12/16 19:33, Chris Hogg wrote:
On Thu, 08 Dec 2016 19:23:01 +0000, Chris Hogg wrote:

On Thu, 8 Dec 2016 18:56:03 +0000, Tim Watts
wrote:

I've always wondered - how thick is a the clay layer likely to be
(feet,
meters, 10's metres?)

Where are you? Some parts of the country, especially in the east, the
clay can be many hundreds of feet thick, although around Cambridge the
soil can be quite sandy, I believe.

Found this map: http://tinyurl.com/jol3f2j The white area running from
Norfolk to the Isle of Wight is chalk, the coloured bits are clay of
one sort or another.

There are detailed geological maps online a BGS

http://www.bgs.ac.uk/data/maps/




That's incredibly interesting - thank you!

"Ashdown beds, sands and silts with subordinate clays - 140m"