A303 Boreholes Show The Planned Route

The excellent BGS webpage Geology of Britain has links to borehole reports as well as to the underlying geology.


http://mapapps.bgs.ac.uk/geologyofbritain/home.html

Or in 3D - http://mapapps.bgs.ac.uk/geologyofbritain3d/index.html

Click to enlarge.

If you try the links on the new boreholes to the north of Winterbourne Stoke (on the BGS website) it shows they are from the Stage 2 of the A303 investigation and the results aren't available (yet?) and some are confidential...

But I think we can see the routes they are thinking of.

The bright green splodges are the phosphatic chalk deposits.