1 ^ 



^ 



X 



tf 



8^ 



D 



ILLUSTRATIONS OF THE 



of th 



gi 



to 



hich they are al 



way 



ill/ united, conftituting;, indeed, a part of the 



fame continued rock 



Thefe ph 



e 



h were firft diftina:ly 



in 



gy, and afford a clear fol 



obferved by Dr Hiitton, are of great importance 



on of the 

 i relation 

 very vein 



two chief queflions concerninn- 



th 



b 



granite and fchiflus 



As 



uft b 

 hich 



of a date poilerior to th 



body 



m 



It 



fchill 



IS contained, it follows, that the 



fuper-impofed on the granite 



fter the formation of this laft 



If it be argued 



that thefe veins, though poilerior to the fchifl 

 are alio poilerior to the granite, and were form 

 ed by the infiltration of water in which the gra 



or fafpended ; it may be re 



fol 



dilTolved 



^ 



imo, That the power of water to dif- 



granitC; 



pollulatum of 



fame kind 



ilances 



we have fo often, and for fuch good reafon, 

 fed to concede ; and, ido, That in many in- 



d from the main body of 



pro 



the granite upwards into the fchifl 

 they are in 



the horizon 



as ; fo that 

 anes much elevated in refped of 

 md have a diredion 



that which the hypothefis of infilt 



quite oppolite 



quires. It remains certain, 



t 



fore, that the 

 proceeding 



whole mafs of granite, and 



from it, are coeval, and both of later form 

 than the ftrata. 



Now 



i 



