General   (General discussion, talk about anything.)

Sorry to introduce some facts into the geology for you but here goes

genarally in that central area and extending into Mesnes St New Market Street as far as Hallgate ,below the initial 1m of overburden lies approx 7m of saturated and mobile sand down to rockhead . Hence the replacement of the old sewer beneath the Market Hall which was driven along Mesnes Street /New Market Street to Hallgate was tunneled using compressed air to control and prevent inundation of the drive . Sea shells I dont recall any .
Incidentally I was there