182 OBSERVATIONS ON THE GEOLOGY, &c. 



From all that has been here stated, it should seem, that granite forms 

 the basis of all the continuous ranges of hills on the coasts I have 

 described ; — that a bold and marked lime formation runs parallel to these 

 ranges, but that this is occasionally interrupted, as far as can be judged of 

 from an examination merely of the surface^ — that schist is of very frequent 

 occurrence, and that tin, in shape of an oxyd, and invariably associated 

 with the granitic hills, or formed in their vicinity (and supposed to extend 

 tip to N. Lat. 20° if not beyond it) and iron, in various states of combina 

 tion, are the principal metals throughout this wide range. 



I have only now, in conclusion, to express a hope that this rapid and 

 very imperfect geological outline may, at some future period, be filled up 

 by a more able hand than mine. 



-mpfl VIII. 



