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
Stoke Bruerne public footpaths cross the area around Stoke Bruerne. One such walk, taking in Grafton Regis, was the subject of a "Daily Telegraph" article. Other walks in and around Northampton are mentioned in the County Council Right of way site. The village is home to one of the three museums owned and run by Canal & River Trust. The others are at Ellesmere Port and Gloucester Docks. About half a mile north of the village is the south portal of Blisworth tunnel - accessible by a walk along the old towpath (on the eastern side of the canal - north of