380 



GEOLOGY OF THE ISLE OF PURBECK. 



The cliffs around this semicircular basin present 

 the same section as those in Worbarrow ; the 

 entire series of strata, from 

 the chalk to the oolite, being 

 clearly exposed. The plan, 

 lign. 33, explains the relative 

 position of the deposits, 

 as seen on the west side of 

 the bay. On the east side, 

 a similar section occurs, as 

 represented in lign. 34; and 

 the chalk, firestone, gait, 

 Wealden, Purbeck, and Port- 

 land beds, are seen in their 

 natural order of superposi- 

 tion, in a distance of be- 

 tween five and six hundred 

 yards, proceeding from north 

 to south. 



A view of this part of the 

 bay, from the west, is given 

 PL XVII. In this sketch a 

 small portion of the base of 

 the chalk downs is visible on 

 the left; the low cliffs that 

 succeed, and wind round the middle of the bay, are 

 the lower cretaceous strata, and the clays and sands 



2 c$ 



