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 Year's Eve 1867 which marked the end of the project. In 1884-1888 a railway was built all the way between Gällivare and Luleå, the Iron Ore Line. Remains of the canal project can still be seen on several places in Norrbotten and Swedish Lapland, for example in Boden. These remains are sometimes called "Engelska graven", which is a play on the Swedish word "grav" which can mean both "ditch"/"trench" and "grave/"tomb". 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