334 



ILLUSTRATIONS OF THE 



of limftone or micaceous fchid 



ferred fr 



It may be' 



this, that thefe plates of g 



are not fo thick but that they admit of compa, 



with certainty 



fon with bed 



are kno 



to be of aqueous formation, and I am therefor 



difpofed to b 



that 



granite of St G 



thard, in this part at leaf!:, is ftratified. Th 

 fition from gneifs to granite en mafs, is r 



mmon. as SauiTu 



h 



obferved in other 



der 



ftances, and as we are juft about to coni 

 more particularly. 



299. In the mountains of our ow^n country, fomi 

 :ulties concerning the llratification of gra 



diffi 



the 



have alfo occurred. In Arran, for inft 



which I have 



d abov 



as 



f Goatfield, v 

 affording an inftance of g 



fending out many 



d 



as 



it 



ins into the fchiftus, and 

 by means of them to the 



fuperincumbent rock, wh 

 a view of verifying on th 



I 



ifited it, 

 the intei 



oh 



with 

 fting 



ervations w^hich Dr Hutton had there mad 

 peared to me to be v/ithout any veftige of fir; 



fie 



in Its granitic p 



as did alfo the 

 'hich it belongs. 



whole group of mountains to whi( 



It Vv^as, therefore, not without a good deal of fu 



prife, that I lately read, in an ace 



account of that 

 ifland, by a very accurate and ingenious mine- 



ralogiil, 



k.* 



* Voyages aux Alpes, torn, iv, § 1830. 



