308 Dr. Mac Culloch on the Junction of Trap, ^c. 



during the deposition of the greenstone bed, yet some other 

 expedient must be resorted to before the curvature of the sandstone 

 stratum can be accounted for. The explanation afforded by the 

 Huttonian hypothesis is too apparent to require notice. 



Whether this hypothesis be esteemed well founded or not, it 

 must rest on a much wider basis than that of the mere phenomena 

 which accompany the trap rocks. But if we consider those rocks 

 with the appearances which I have now described, and which they 

 so often exhibit, we may safely conclude that no hypothesis is 

 competent to explain geological phenomena at large, which does 

 not admit of the forcible displacement of the strata which ac- 

 company them, and on which the marks of violence are so evi- 

 dently impressed. 



