AND tHEIR MEETING fvlTJH GRANITE. SI 



another set occurs in a position similar to the first, but having 

 a no less decided dip to the west. 



On the shore of the sea, however, where these rocks are 

 bare, and exposed in such a manner, that our view can em- 

 brace at once a considerable extent of the mass, the general 

 structure becomes apparent, and we are enabled to give a ra- 

 tional account of these seeming anomalies. 



This opportunity of observation, occurs with peculiar ad- 

 vantage on the coast of Berwickshire, where the lofty cliffs 

 which extend from Fast Castle eastward to Gun's Green near 

 Eyemouth, present to view a cross section of these strata, by 

 which their position is seen to possess much more method and 

 regularit}'^ than the inland rocks would have led us to expect. 

 The strata here exhibit a succession of regular bendings, and 

 powerful undulations, reaching from top to bottom of the 

 clitfs, two or three hundred feet in height. These are occa- 

 sionally interrupted, as might be expected, by the irregulari- 

 ties of the coast, by shifts and dislocations of the beds, and 

 sometimes, as happens at St Abb's Head, by the intervention 

 of Avhinstone ; or occasionally of porphyry. 



Notwithstanding these interruptions, I reckoned, (in an 

 excursion to that coast, made last summer with my son 

 Lieutenant Basil Hall of this Society), sixteen distinct 

 bendings, in the course of about six miles, each of the largest 

 size, and reaching from top to bottom of the cliffs, their cur- 

 vature being alternately concave and convex upwards. Plates 

 I, II and III. are from drawings made on the spot. Fig. 1, Plate 



I. shews a general view, taken at sea, at some distance off the 

 point of Fast Castle, which appears upon the right hand. Plate 



II. shews a near view of part of the same scene, representing a 

 spot called the Brander Cove, in which one of these convolu- 

 tions, concave downwards, is conspicuously seen. The rock 



Vol. VII. L upon 



