368 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 9,
About a quarter of a mile W. of
this place, on the Billing road, at n,
in digging out cellars for houses, a
section of about 12 to 14 feet has
been exposed, cut through a continuation
of the ironstone beds of the
Asylum section.
About midway of the section is a shelly zone about 8 or 10 inches in thickness, in which Limoe of several species (generally large) are very abundant, and indeed almost the only shells. At a level a little above this zone, corals (Thamnastroea and Latomoeandra Davidsoni) occasionally occur. The soft white material of the last section is also found here.
Very near to the last spot, in Frithstreet, at o, in excavating for building, several years ago, a section was opened analogous to the Asylum section, and containing very shelly zones. At a few feet from the top, a zone of coral (Thamnastroea), frequently in large masses, was found.
A similar zone was broken through, a short time since, in making a culvert in St. Giles's Street (p), and was here locally associated with Pinna cuneata and Gervillia acuta. Similar coral has been found at an intermediate point.
The junction of the Northampton Sand with the Upper Lias clay has produced in the town of Northampton many springs of ancient repute, such as Scarlet Well (in the old dyers' quarters), King's Well, St. John's Well, Becket's Well (named in mediaeval times in commemoration of the last interview between Henry II. and the Archbishop, held at Northampton in a.d. 1164), and Nine Springs Head. The Water Company draw their supply chiefly from the Marlstone by a well, 168 feet deep, starting from a level about midway of the Asylum section.
