Blisworth Limestone Formation relationship to the Jurassic ridge, to the west of Peterborough. (BGS sheet 157) Around Towcester it reaches a thickness of 9m. (Hains & Horton p. 85) Blisworth limestone is used as a building material, in particular as blocks of stone. Lilford Hall in Northamptonshire is made from Blisworth limestone. Blisworth Limestone Formation The Blisworth Limestone Formation is a geological formation primarily consisting of limestone deposited during the Bathonian stage of the Middle Jurassic, found in the Jurassic ridge which extends north and south through England. It was laid down in the shallows of the Jurassic sea and is part of
Bruce Tunnel Savernake Forest which is open to the public with footpaths, drives and picnic sites, hence the tunnel is also sometimes known as the Savernake Tunnel. The main Paddington to Penzance 'Berks and Hants' railway line crosses the tunnel diagonally; both portals can be seen from the windows of passing trains with the canal running close to the railway at each end. Bruce Tunnel The Bruce Tunnel is on the summit pound of the Kennet and Avon Canal between Wootton Top Lock and Crofton Locks in Wiltshire, England. This is the only tunnel on the canal and it is 502 yards