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
Blisworth and Birmingham Railway, under the surveying and construction control of Robert Stephenson, bypassed Northampton and opened a station in Blisworth in 1839. In 1842, after much discussion, Lord Grafton agreed to fund a new station as long as it was a "first class" station - i.e., all trains stopped at it. Ford Lane became Station Road, the location of Blisworth station. In 1845 a branch line on to Peterborough was completed via Northampton, and in 1866 a single-track line was built to Banbury. Blisworth station closed in January 1960 and both branch lines have also long since gone. The main