296 



ILLUSTRATIONS OF THE 



# 



fed 



ma 



fs is greatly inclined to the horizon, the 



ftrata which 

 verthelefs as 



reft 



anoth 



on this inclined plane, are ne- 

 6lly parallel to that plane, and 



as 



tal. 



f they 



really horizo 



It is certain, therefore, that they 



depofited on the fame inclined plane on which 

 they now reft ; for, if fo, they would have been 

 ftil] nearly horizontal, and by no means parallel 



the inclined fide of the whinft 



This fol 



lows from the nature of aqueous depofition, as 

 already explained. 



We have a remarkable inftance of the pheno- 

 menon here referred to, in the rock of Saiifbury 

 Craig, of w^hich mention has been fo often made. 



d in which 



moft every circumft 



ted, that can ferve to elucidate the natural hifto- 

 ry of bafaltk rocks. The north end of that 

 rock is in the figure of a wedge, with its in- 

 clined fide confiderably fteep, and covered by 

 ftrata of grit, perfedtly regular, and parallel 



The 



in- 



to the furface on which they lie. 

 fpedion of them will convince any one, that 

 they were not depofited by the water^ on a 

 bottom fo highly inclined as that on which they 

 now refi;. They are of a ftrudlure Very fchiftofe , 

 their layers very thin ', fo that any inaccuracy of 

 their parallelifm would be readily obferved. 



The appearances of the horizontal depofition of 



thefe fi:rata, are indeed fo clear, and fo impofli- 



ble 



.. * 



