STUDLAND. 



487 



of which they are a prolongation. The right side of this 

 crack forms the left of an insulated mass, filling up the mid- 

 dle of the ravine, on the right of which the beds are horizon- 

 tal (fig. 63). 



The farther end of the ravine closes abruptly, but the view 

 beyond it is given in fig. 64. 



C, Chalk. 



P C, Plastic clay. The arrow shows the direction of the ravine, 

 arrow points out the opening in the chalk at Three-forked Down. 



The dotted 



Continuing the examination of the surface along this table- 

 land, we discover that a declination of the level takes place 

 from the head of this ravine to the head of that on the south 

 side of the Red Rock, which passes under a cliff of yellow 

 and red sand, extending from under the church-yard, and 

 capped by a bed of whitish sandy clay (used for walls of 

 buildings), which is naturally split into quadrilateral frag- 

 ments ; the dip of these beds being from the southern chalk 

 of Ballard Down. So that Studland may be considered as a 

 square mass of country, leaning upon the chalk on the south- 

 ern and eastern sides, and dipping from it in those directions, 

 as it would naturally do upon the supposition of its having 

 been deposited upon the slopes of the chalk, and afterwards 

 subjected to the forces of elevation by which the chalk has 

 been deranged. 



That this must be the exact state of the case is confirmed 

 by the condition of the country intervening between Studland 

 and the chalk ridge of Ballard Down. The plastic clay be- 

 hind Studland ranges, in Studland Heath, to a level nearly as 

 high as the summit of Ballard Down itself, but it has been 

 subjected to violent denudating agents, and a deep valley, 



/. 65 



Studland Heath. 



C C, Chalk Downs. 



1, Devil's night-cap. 

 Three-forked Down. 



2, Pipe-clay heds. 

 4, Shore. 



3, Opening at 



