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HUTTONIAN THEORY. 



3" 



is interfered by no lefs than fix very powerful 

 veins of granite, all of them accompanied with 

 fuch marks of diforder and confufion in the lira- 



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ta, as indicate very flrongly the violence with 

 which the granite was here introduced into its 



place 



Thefe veins very probably belong to 



the great mafs of granite which is known to 

 form the central ridge of the Grampians further 

 to the north ; but they are feveral miles diltant 

 from it, and the connedlion is perhaps invifible 

 in the prefent Hate of the earth's furface. 



278. The fecond kind of granite vein, is one 

 which proceeds vifibly from a mafs of that rock, 

 and penetrates into the contiguous Itrata. The 

 importance of this clafs of veins, for afcertain- 

 ing the relation between granite and other mi- 

 ileral bodies, has been pointed out, § 82. ; and 

 by means of them it has been fhewn, that the 

 granite, though inferior in pofition, is of more 

 recent formation than the fchiftus incumbent on 

 it ; and that the latter, inftead of having been 

 quietly depofited on the former, has been, long 

 after its depofition and confolidation, heaved up 

 from its horizontal pofition, by the liquid body 

 of granite forcibly impelled againlt it from be- 



+ 



low. 



It has been alleged, in order to take off the 



force of the argument derived from granite 



vtiins, 



U4 



