ON THE CIRCULATION OF UNDERGROUND WATERS. 



119 



establish the folio-wing sequences of deposits in the vaUey of the Trent, near 

 Burton, in descending order : — 



f 1. Old alluvial deposits. 



2. Valley-sands and gravels. 

 I 3. Terrace-gravels. 

 ■i 4. Stratified sands, gravels, and 

 peat of fluviatile origin. 



5. Drift sands and gravel. 



6. Boulder-clay. J 



7. Ehfetic beds. 



8. Keuper Marls 1000 feet thick. 



9. Keuper Sandstone 250 „ 



10. Bunter Conglomerate 300 „ 



11. Coal-measures, 



In the bottom of the valley. 



. On the slope of the vaUey. 

 On the top of the hills. 



All the Burton wells previous to 1856 were sunk in the valley-gravels, 

 and were not more than 20 feet deep ; in that year Messrs. Ind, Coope, and Co. 

 sank a well 24 feet in depth in Station Street; and since then all the old brewery 

 wells have been deej^ened, and are now carried down to the underlying Keuper 

 beds. 



To obtain a supplementary supply to that afforded by the gravels and the 

 top of the Keuper deposits, Messrs. Bass and Co. bored through 194 feet of 

 gypsum marls with bands of hard sandstone ; but it only produced one gallon 

 of water per hour. 



In 1867-68 Messrs. AUsopp and Sons sank 28 feet through gravel and 

 bored 102 feet, with a similar unsuccess. The various borings carried out by 

 these firms and Messrs. Salt and Co. prove the existence of two faults in the 

 very centre of the valley, bringing up the Keuper Sandstone, with a vertical 

 downthrow towards the river of no less than 1100 feet, the whole of which 

 enormous mass of strata has been denuded away. 



Mr. Molyneux gives the three following analyses — (1) of water from an arte- 

 sian boring in Keuper marls 70 feet in depth, (2) of water from a well 30 feet 

 deep in vaUey-gravels, on the east side of High Street, in the time of the 

 old breweries, and (3) of a well on the Avest side of that street. 



