Surrey Wells and their Tcachimjs. 53 



Fetcham. — M;-. Hankey's. 



Dr. J. Mitcliell's MSS., vol. 2, p. 263. 



Gravel 8 



Blue [London] clay 20 



rp ,. (Sand 38 



Lixeatung J g.^^^^^ ^^-^.j^ oyster-shells (some 



±ieas.| I 7i. iuches across) 7 



Chalk 3 



76 



Forest Hill. — Mr. Sivamboroiiyh's. 



Dr. J. Mitchell's MSS., vol. 4, p. 201. 



Mould and yellow clay about 1 



Black [London] clay 200 



Then bored for 75 



To gravelly sand and water 276 

 Another well on the hill dug through 300 feet of black clay to 

 coarse sand and black pebbles. 



Frimley. — Mytchett Place. 1882 ? 

 Rev. A.Irving, Quart. Journ. Geol. Soc, vol. xH., p. 496 (1885). 

 250 feet above Ordnance Datum. 



Upper Bagshot, (White sand ;j3 



Go feet. i Loamy sand 1'.^ 



Middle Bagshot, ( Light-gi-een sand '2 



28 feet. ( Dark green sand '20 



T -D 1 i. ( Sharp light-green siuid 87 



^°Tno/°. ' Light-gi'een and sharp sand, 



102 feet. I " wfth sheUs, &c 15 



/Blue clay, with smooth pebbles 33 



_ , „i Green loamy sand 2 



London Clay , J ^^^^ ^^ ^^^ ^^^^^^ 4 



67 feet. I Blue clay 11 



VDark green sand and clay 17 



„ J. -D J ( Dark green sand 23 



Reading Beds, ^^,^^^^ ^^^^^ ^^^^ ^^^ ^^y _ 23 



b8teet. [Very fine sharp sand 22 



330 

 Though this section has been pubhshed only lately, it may be 

 well to reproduce it here, for, if Mr. Irving is right in his classi- 

 fication of the beds, we have a most unexpected decrease in the 

 thickness of the London Clay, which has been proved to be 

 300 feet and more in other wells at no very great distance. 

 This great and sudden thinning-away of a formation not in the 

 habit of doing that sort of thing, save in a very gradual fashion, 



