HUTTONIAN THEORY. 



of the vein, and the produdion of the flips which 



c 



accompany it, and to regard them as parts of 

 the fame phenomenon. 



57. Where thefe flips are horizontal, and ex 

 hibit great bodies of ftrata carried from their 

 place, while the parts of the transferred mafs re- 

 main undifturbed relatively to one another, they 

 furnifli a clear proof, that this change of place has 

 not arifen from the falling in of the roofs of ca- 

 verns, as fome geologifts fuppofe. The horizontal 

 diredion, and the regularity of the movement, 

 are incompatible with the adion of fuch a caufe 

 as this ; and indeed it is highly interefting to re- 



mark 



m 



the 



dftof 



flgns of difl:urbance 



which prevail in the bowels of the earth, that there 

 reigns a certain fymmetry and order, which in- 

 dicate the adion of a force of incredible magni- 

 tude, but flow and gradual in its effeds. 



parts of the mafs moved are undifturbed 

 tively to 



The 



one 



the 



hat has been b 



h 



been cemented 



the breaches of continuity 



have been filled up and healed ; and every whe 

 we fee the operation of a caufe that could uni 



well as fepa 

 expand and 



m 



The twofold adtion of heat 

 It, could fcarce be pointed 



out more clearly by any iy^L 



f 



appea 



ces. 



A 



a long period was no doubt required 



for the elevation of the ftrata, the rents 



mad 



in 



ft 



