HUTTONIAN THEORY. 



175 



Is 



i 



It 



» 



20 



tit 



whole chain, indeed, for fecondary mountains, 

 is of great elevation. The ftrata are of lime- 

 ftone, and of a very coarfe-grained fandltone, 

 alternating with it. No mountains can more 

 clearly point out, that the ftrata of which they 



fift were once continued quite acrofs th 



r 



lies 

 the 



r 



hich now fep 



them 



d hence 



f 



materials of thofe ftrata were indeed fur 



nilhed from any contig 



prim 



the latter muft have been, out of 



moun- 

 [1 pro- 



portion, higher than any mountains now in 



Eritain 



\ 



157. Thus, a great degradation of the primi- 

 tive mountains, and of courfe a great travelling 

 of their materials, is proved to make a neceflary 



part of the Nep 

 this travelling 01 



theory 



Th 



of 



fportation may be render 



ed more 



d 



f we apply a lim 



mod 



of reafoning to larger portions of the globe 

 The north-weft of Europe furnifh 

 ftance of a very extenfive tr; 



an m- 



a 



tain, th 



f fecondary 

 ry, comprehending the greater part of Bri- 



f Flanders and Holland, part 



of Germany, the northern provinces of F 

 and probably the bed of the German Ocea 



VV 



at 



this circle al- 



leaft for a great extent. 



moft all is fecondary, and on the fides of it all 



round are placed ridges or groups of 



pri 



namely, the mountains of Auvergne 



at 



