This deposit of shells is situated about a mile and a half west from Borrowstounness, where the Carse of Falkirk terminates in a strip of flat land a furlong in breadth. The shells are exposed in two openings, each about 300 feet long, made in the soil to procure limestone for Mr Wilson's iron-works. The bed can be traced in these openings along lines having an aggregate length of 1000 feet. Over all that spare the shells form an unbroken stratum of very uniform depth (nearly three inches), and almost perfectly horizontal.