PROCEEDINGS 



OF THE 



Cmitkfog^ l|lji(a£0pljixal Saattg. 



On a Well-sinking, at Graveley, near Huntingdon. By the 

 Rev. O. Fisher, M.A., F.G.S., Hon. Fellow of Jesus College. 



[Read 30 October 1905.] 



The position of this well on the six-inch Ordnance Map is half- 

 way between the "R" in "Rectory" and the "B" in "B.M. 154-5/' 

 which figure may be taken as the height in feet of the locality 

 above Ordnance datum. It seems desirable to put on record the 

 strata which have been proved in this an extreme western corner 

 of the county of Cambridge. 



The work was started in the spring of 1905, under the advice 

 of a water-finder. The sinking was begun in Boulder clay, and 

 after passing through 50 feet of this the Oxford clay was 

 encountered. This was dug into to a depth of 94 feet from the 

 surface, and then bored further to the depth of 302 feet from the 

 surface. A bed of stone, probably Cornbrash, was now reached, 

 and was punched through for 1^- feet. A foot more was then 

 bored in clay, when a hard rock was encountered, and the work 

 was abandoned. 



The section then was, 



feet 



Boulder clay 50 



Oxford clay 252 



Cornbrash 1|- 



Clay 1 



Rock (thickness not proved) 



30ij 



VOL. XIII. PT. IV. 13 



