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
Rove Tunnel Rove Tunnel The Rove Tunnel is a canal tunnel in France that connected Marseille to the Rhône river. It was opened in 1927 and closed in 1963. With a length of it was a major work of civil engineering and one of the longest such tunnels. The tunnel was the most challenging section of the Canal de Marseille au Rhône, which connected Marseille to the Rhône river. The canal has a total length of . The tunnel starts near the village of Le Rove, and runs through the Chaîne de l'Estaque at sea level. The tunnel is long, wide and