WILKIEHAUGH AND SCOUGAL. 



233 



countries. Fig. 8. PI. xii. represents several of the 

 characters of the trap-tuff. 



The sandstone cliffs that succeed these rocks of 

 tuff, are low, and of but inconsiderable extent ; but 

 the ledges of this rock continue onwards to Belha- 

 ven Bay, where they disappear under the loose 

 sand, which extends onwards from thence to Whit- 

 berry. 



In a low cliff of the sandstone, we observed an oval 

 concretion of the same rock ; and, in many places, 

 the sandstone was observed to alternate with slate- 

 clay and thick beds of bright red clay-ironstone, 

 like that in the red sandstone at the Cock of Arran. 

 The ledges of sandstone at Wilkiehaugh, are tra- 

 versed by veins of greenstone and amygdaloid. 

 These trap rocks contain amethyst, either in veins, 

 or imbedded ; and one variety is particularly beauti- 

 ful, having a dark coloured ground, with beautiful 

 violet-blue coloured imbedded portions of amethyst. 



From Belhaven Bay, to the commencement of 

 the rocky coast which extends from Mr Brodie's, at 

 Scougal, to North Berwick, the coast is sandy, with 

 the exception of Whitberry and Raven sheugh, 

 which are of trap and sandstone. These points I 

 had not an opportunity of examining ; but Dr Mac- 

 knight has promised to lay a description of them 

 before the Society *. 



* This has been done since the reading of the paper, — Vide 

 Memoirs of Wernerian Society, vol. ii. p. 404?. et seq. 



