Siprey Wells arid their Teachmjs. 



61 



FT. IN. 



Chalk, much shattered 6 4 



Very' hard chalk 4 8 



Chalk, very much shattered 3 



Moderately hard chalk til 9 



Hard chalk 13 5 



Very hard chalk C 7 



Very rotten chalk, with much bad air... 2 

 Shattered chalk, with much gas : a few 



round flints about 100 feet down... 51 

 Very hard chalk, increasing in hardness 



[downwards] 85 



Extremely hard chalk 8 



Very rotten clayey chalk 1 



Grey chalk ; water at 256 feet 62 



300 



Richmond. — Waterwurks, about 160 yards below the Bndije. 

 1876-1884. 



Prof. Judd (Quart. Journ. Geol. Soc, vol. xL, pp. 724, &c. ; 

 vol. xli., p. 524). 



About 17 feet above Ordnance Datum. 



Shaft (and cylinders) 253 feet ; the rest bored. 



FT. IN. 



10 



10 



160 



fMottled red and green clays 44 



Made ground 

 Sandy gravel 

 London Clay 



Reading Beds, 



KQi ft \ 



59* ft 



Yellow sand 



Sandstone 



Light-coloiu:ed clay 



Clay, with much lignite, and with pebbles at 



the base 



(Light-grey sand 13 



Thanet Sand, I pg^^.j. ci^yey sand, with much glauconite 



225 It. [Creen-coated flints 



Upper Chalk, /White chalk, with layers of flint about 



I White chalk, with few flints about 



/Cream-coloiu-ed hard nodular bed (? Chalk- 

 rock), not over 5 feet 



Greyish chalk, without flints, about 20 feet 



down, a hard bed, 137 feet 



Hard yellowish crystalline chalk, partly 

 nodular, partly conglomerate, not over 



15 feet (Melbourne Rock) 



Grey marly chalk, without flints, more 

 clayey and darker lower down, and 

 passing into : — 

 Chalk Marl, not less than 50 feet 



300 ft. 



Middle Chalk. 



Lower Chalk. 



