HUTTONIAN THEORY. 



S 



M 



af 



I \ 



indications of its igneous origin, already enume- 

 rated, feme others that are peculiar to it when 

 in this fituation. In fuch inftances, it is not un- 

 common to find the llrata in fome places, contit 

 guous to the whin, elevated, and bent with their 

 concavity upward, fo that they appear clearly to 

 have been aded on by a force that proceeded 

 from below, at the fame time that they were 

 foftened, and rendered in fome degree flexible : 

 it is needlefs to remark, that thefe effedls caa 

 be explained by nothing but the fufion of the 



d that the great force with which 



whin 



impelled again ft tlie ftr 



ita, could be produced 

 by no caufe but heat, ading in the manner that 

 is here fuppofed. 



71. Again, if it be true that the malTes of 

 whin, thus interpofed among the ftrata, were 



4 



introduced there, after the formation of the lat- 

 ter, we might exped to find, at leaft in many in- 

 fi:ances, that the beds on which the whinftone 

 refls, and thofe by which it is covered, are exad- 

 ly alike. If thefe beds w^ere once contiguous, and 

 have been only heaved up and feparated by the 



thei 

 this 



ption of a fluid mafs of fubterraneous 

 r identity fliould ftill be vecognifed. 



precifely what is obferved 



to hold in a vaft 



mber of inll 



Now, 

 known 

 and is 



ftrikingly exemplified in th§ rock of Salijhury 



Cragj near Edinburgh. 



This 



