... MINING CHALK TUNNELS CHANNEL TUNNEL ROCKS GEOLOGY BORING OOLITE SEA BEDS SAND CARBONIFEROUS LIMESTONE LOWER CHALK CEMENTATION FISSURES PUMPING WATER SUPPLY GROUNDWATER INFLOW KENT ENGLAND DOVER SHAKESPEARE CHANNEL TUNNEL TILMANSTONE UK ENGLAND 66 Discussion...

... thewells and springs inthe neighbourhood weredried. There could be no question thatthis was duetothe pumping, because when thewater was dammed back in the works it rose again to its oldlevel in thespringsand wells. It appeared tohimthatifanylarge quantity was abstracted from the Lower Chalk the same thing...

... latter is darker in colour, and is often affected by the presence of particles of silicate of iron, whilst in texture it is apparently rather closer and harder than the upper chalk. A cubic foot of the Upper Chalk weighs nearly l59 lbs., and of the Lower Chalk barely 154 lbs. I n round figures: the chalk...

... through Hartlip to the Maidstone river, and the ather from Sittingbourneto Freebourne Mill Pond. They both passed from the Tertiaries across the Upper and Lower Chalk into the Greensand. He was able by these t o show the line represented by the surface of the water in the Chalk, which he then ventured t o...

.... northerlyinclinedplane is grooved by severalsystems of dry valleys, from which, a t the pointswhere they are cut off by the Tertiary beds, there spring thCeray, the Ravensbourne, the Wandle, the Hog s Mill River, and the Clandon Brook. The chalk escarpment consists almost entirely of the Lower Chalk, the Chalk...

...D T ANSTED © Thomas Telford and ICE 1850 CHALK WATER CONTENT GEOLOGY GROUNDWATER CAPACITY ABSORPTION CRETACEOUS FORMATION DEPOSITS UPPER CHALK UPPER LOWER CHALK LOWER EXPERIMENTS ROCKS ABSORBENT 360 WATER CONTENT%OF CHALK. April 30, 1850. WILLIAM CUBITT, President...