142 GEOLOGY OF TUE ISLE OF WIGHT. 



near Rookley, about four miles south of Newport. 

 " It presents," observes Mr. Hopkins, " a north 

 and south line of flexure which must almost neces- 

 sarily be accompanied by a corresponding north 

 and south fracture, in which I conceive the valley 

 to have originated." 



Newport to Calbourne and Alum Bay. — 

 From Newport, the road passes through the pic- 

 turesque and interesting village of Carisbrook, 

 and near the venerable castle, which stands on 

 an eminence of chalk, on the left;* and from 

 thence to Calbourne, a little village, five and a half 

 miles from Newport. In the vicinity of Calbourne 

 there are several quarries of freshwater limestone, 

 where the stone is extracted for building, and 

 agricultural purposes. The shells in the lime- 

 stone of this part of the Island are generally in a 

 much better state of preservation than those found 

 at Binstead. The finest specimens in my collec- 

 tion, were obtained from the quarries at Calbourne, 

 Khalfleet (a village on the Yarmouth road), and on 



* Carisbrook Castle, so interesting to the tourist, from the historical events 

 with which it is associated, was founded in the time of Edward IV. The gate 

 way, with its round towers at the angles, and machicolated battlements, 

 resembles the Castle gateway at Lewes, which was erected by John Earl dc 

 Warren, temp, Edward III. See " A Day's Ramble in ami about //" ancit hi 

 Town of Lewes," p. 109. 



The well at Carisbrook Castle is said to he 300 feet deep ; it probably reaches 

 the chalk-marl, which is in general the first water shed when the white chalk 

 is perforated. 



