COAST NEAR NORTH BERWICK. 91 



contact with it, become indurated, while the trap passes 

 into a yellowish- white claystone felspar. On passing Goolan 

 Point, strata of sandstone and mountain limestone crop out 

 at the shore : they dip under the greenstone and exhibit 

 many marks of a disturbed position. About two miles far- 

 ther to the east many other greenstones occur, but their 

 modes of connection with the strata are not exposed. Near 

 Red House a basalt rises through the sandstone : it is ar- 

 ranged in columns of the most symmetrical character, which, 

 in some places, are inclined at a small angle, while in others 

 they are variously bent or completely vertical. By assum- 

 ing crystals of felspar, the basalt acquires, in some places, a 

 slightly porphyritic character. From this to Weaklaw, a 

 point almost opposite the island of Fidra, there is nothing 

 which deserves minute detail ; strata of sandstone, with alter- 

 nating limestone, are exposed on the shore, but their position 

 is so disturbed, and they are so covered with debris, that little 

 can be ascertained respecting them ; they alternate, however, 

 with various felspars, both compact and tufaceous. At Weak- 

 law the strata of the white sandstone series are replaced by 

 the red sandstone conglomerate in a horizontal position, and 

 exhibiting several gentle curvatures, which are probably to be 

 referred to the presence of a body of earthy ferruginous green- 

 stone upon which the conglomerate reposes ; but in regard to 

 induration, there is nothing very conspicuous, the conglome- 

 rate being highly compact throughout. Between this point 

 and North Berwick several other trap dykes occur, associat- 

 ed with the red sandstone ; none, however, are remarkable : 

 they are all composed of greenstone, different varieties of which 

 occur in different parts of the same vein : — thus one part of a 

 vein may be composed of a greenstone of an earthy character, 

 and containing oxide of iron as a colouring matter, whileother 



