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
English Canal English Canal The English Canal () was a planned and partially completed canal project that would connect the Swedish iron ore fields around Kiruna and Gällivare with Luleå and the Gulf of Bothnia. The ore fields were discovered as early as in the 1650s, but due to their remote location in the sparsely populated areas in northern Sweden, far from both the Atlantic coast and the coast of the Bothnian Gulf, it was very hard to transport the ore to any port from where it could be shipped to its ultimate destination. All attempts during the centuries to efficiently transport