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mii 



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teriff 



cbi! 



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4. 



fiUTTONIAN THEORY; 



21% 



Wbich have had their origin at periods extremely 



remote from one another 



Th 



foli dated 



rocks of breccia, pudding-ftone and grit, though 

 they are indications 



of wafte. h 



received 



their prefent charader at the bottom of the fea : 

 the loofe blocks of ftone, the fand and gravel, on 

 the other hand* are the effeds of the wafte now 

 going forward on the furface of the land, and 

 are the materials out of which rocks of the three 

 kinds juft mentioned may hereafter be compofed» 

 If fo fkilful a mineralogift as Saufllire is guilty 

 of fuch inaccuracy, it muft be afcribed to the 

 confufion neceflarily arifing from the fyftem 

 which he followed, and not to his own want of 

 difcrimination. 



187. The fame phenomenon, of a breccia cir- 

 cumfcribing the primary mountains, is met with 

 in Scotland ; and the Grampians, wherever they 

 are bounded by fecondary ilrata, whether on 

 the fouth or north, afford examples of it. The 

 breccia generally conlifts of the fragments of the 

 primary rock, moil commonly rounded, but 

 fometimes alfo angular, united by a cement of 

 fecondary formation, and the whole difpofed in 

 horizontal beds. It was on the conftancy of this 

 accompaniment of the primary ftrata, and on 

 the great quantity of highly polilhed gravel of- 

 ten included in thefe breccias, that Dr Hutton 



grounded the hypothefis of the doubl 



O 2 



railing 



up 





