APPENDIX. 



similar direction. It runs out into the sea like a great wall *j 

 and this, with its green colour, gives it a singular aspect. 

 This stratum is bounded by a stratum of talcaceous schistus, 

 H, which is almost entirely composed of quartz, where it is 

 in contact with the serpentine ; but as it approaches the next 

 stratum, which is marble, it has more of the talcaceous cha- 

 racter, and is also traversed by veins of quartz. The stratum 

 of marble, I, is from 15 to 20 feet wide; is also vertical ; 

 but is of a bad quality, and will not serve for any ornamental 

 purpose. It has, immersed in it, pieces of quartz and tal- 

 caceous schistus. To this stratum succeeds a thin stratum of 

 quartz; and this again is bounded by a thin stratum of tal- 

 caceous schistus, K. Both these strata are only a few feet 

 wide, and are succeeded by a stratum of marble, L, nearly of 

 the same width with the former stratum, I. To this marble 

 succeeds a great stratum of serpentine, M, which is of the 

 same nature with the stratum we have before described. 

 This stratum is bounded by hornblende rockf, N, which 

 forms the rocks that surround the harbour of Portsoy, and 

 continues beyond it towards a bay, the name of which I do 

 not recollect t- It is traversed in several places by veins of 

 granite, which run in different directions, and vary in breadth 

 from one to eight or nine feet. At a little distance from the 

 side of the bay I have just mentioned, another stratum of 

 serpentine, marked O, makes its appearance ; and to it again 

 succeeds the hornblende rock, P, which is traversed by veins 

 of granite . 



" We now walked along the shore by the bottom of this 

 bay; and upon its opposite side, in the place of the horn- 



* Quite the reverse in the sketch. 



*' -f The hornblende rock is generally schistose, and has sometimes scales 

 of brown mica intermixed with it." 



" J The serpentine, as it approaches the hornblende rock, becomes gradually 

 intermixed with it, and at last is not to be distinguished from it." 



" Betwixt Portsoy harbour and the bay I observed marble, but I could not 

 determine how it lay, with respect to the other rocks; so that I have not repre- 

 sented it in the plan." 



