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HUtTONIAN THEORY. 



393 



limeftone, elevated two or three feet above the 

 reft of the furface. This elevation arifes no 

 doubt from the protedion which the flones have 

 afforded to the calcareous beds on which they 

 lie, fo that thefe beds do not wear away fo 

 faft as thofe which are fully expofed to the 

 weather. But it is furely to take a very limited 

 view of the operations on the furface, to fup- 

 pofe, with SaulTure, that the parts of the cal- 

 careous rock under thefe flones has fufFered 

 no wafte whatfoever, fo that the flones remain 



where they were pla- 

 which brought them 



the id 



d by th 



g 



debacle 



down from the high Alps *. For my part, I have 

 no doubt that the Arve, which is flill at no great 



;r level, and in 

 t, aided by the 



dift 



wh 



highe 

 a line different from the prefeni 



glaciers and fuperior elevation of the mountains, 

 was an engine fufEciently powerful for effecting 

 the tranfportation of thefe flones. 



Thefe phenomena are not peculiar to the 

 but prevail, in a greater or lefs deg 



35 



Alp 



the vicinity of all primary or granite mountai 

 In the ifland of Arran, a fragment of th 



fame 



kmd with that which conflitutes the upper part 

 of Goatfield, is found on the fea-lhore, at leaft 

 three miles from the nearefl granite rock, and 



with 



* 



Ihid, § 227. 



