Blisworth Limestone Formation today in the seas off the Bahamas (Kirkaldy p. 59). Much of it also contains marine shells, notably of oyster. Subsequently, the site was submerged less deeply so that the overlying Blisworth Clay was deposited in brackish conditions. (Gallois p. 20) The stratum is known as Blisworth Limestone because it was first studied at Blisworth in Northamptonshire when the Blisworth tunnel was being dug for what is now called the Grand Union Canal. The tunnel finally opened in 1805. Blisworth limestone is a generally thin but widely spread deposit in eastern England. It becomes thicker as one progresses southward from
Sapperton Canal Tunnel bring water from the River Severn toward the Thames Basin and London; if such a plan is realised the Sapperton Canal Tunnel could be utilised to transport water. In "Hornblower and the Atropos" by C.S. Forester, Hornblower helps the boatman "leg" through Sapperton Tunnel after the boatman's assistant is incapacitated. Forester spends the first two chapters of the book on the canal-boat journey, Roughly a third of the first chapter is devoted to the tunnel. In the novel "Gone" by Mo Hayder the tunnel is used extensively as a location in this crime thriller. Sapperton Canal Tunnel The Sapperton Canal