132 APPENDIX. 



Cranley and Horsham turnpike -roads, and follows the latter to 

 Pain's Hill. 



The southern boundary is taken hence in a westerly direction 

 through the wealden clay, immediately at the base of the lofty 

 range of hills commencing at Hascomb Beech, and terminating 

 at Bowler Green, near Hindhead. From this point the western 

 boundary is formed by an imaginary line through Cosford crossing 

 Thursley Common to Elstead, and continued thence over Crooks- 

 bury and Puttenham Commons by Hampton Lodge, passing over 

 the Hog's Back near Shoeland Farm to the commencement of the 

 northern boundary. 



Geological Features of the District. In noticing these, I 

 commence with the northern limit, which is a termination of the 

 London clay resting upon the chalk. I am not aware that any 

 portion of the plastic clay is to be found within the limits : the 

 Bagshot sand, which is so conspicuous, does not approach nearer 

 than Romping Downs, about two miles distant. The principal 

 feature is the beautiful chalk ridge called the Hog's Back, which 

 scarcely exceeds half a mile in breadth. "This remarkable 

 ridge of the North Downs extends from Guildford to a point 

 about two miles from Farnham, and has evidently been pro- 

 duced by an upthrow of the chalk, and the breaking off of the 

 southern portion of the curve. The inclined position of the re- 

 maining side of the flexure is seen at the western extremity of a 

 large chalk-pit, between Guildford and Puttenham, where the 

 strata dip towards the north at an angle of about 30. The 

 upper beds are very white, with courses of the usual dark flint 

 nodules ; and a remarkable feature in this quarry is the distinct- 

 ness with which the chalk is . divided into masses approaching to 

 a rhomboidal figure, by seams oblique to the stratification ; the 

 angles of the portion thus formed standing out in the face of the 

 cliff, like splinters in the shattered fracture of a crystal." 



Descending its southern side we meet with a narrow stratum 

 of fire- stone, which " forms a slight projection along the foot of 

 the Hog's Back ; the gait, a corresponding depression along its 

 whole length," varying in breadth from a few hundred yards 



