400 



ILLUSTRATIONS OF THE 



whole geological hiftory of this part of Africji 



feems highly interefting, fi 



as far as can he 



died from the accounts of th 



genious 



traveller juft mentioned, it coniifls of horizontal 

 beds of fandftone or limeftone, refting immediate- 



on gran 



or on primary fchiftus 



Loofe 



blocks of granite are feen in great abundance 



the foot of the Table M 

 fea-fhore. 



d along the 



^ 



357. The fyftem which accounts for fuch 

 phenomena as have been confidered in this and 

 fome of the preceding notes, by the operation of 

 a great deluge, or debacle as it is called, has 



^ 



been already mentioned. In Dr Hutton's theo- 

 ry, nothing whatever is^ afcribed to fuch acci- 



dental and unknown caufes 



d, though th 



fie 



IS 



abfolutely denied, their effedls 



whatever they may 



been, are alleged to 



b 



A minute difcuflion. h 



be entirely obliterated, fo that they can be re- 

 ferred to no other clafs but that of mere poffi- 



)wever, of the 

 1 the fur face of 

 e the interpo- 

 would lead in- 



queftion. Whether there 

 the earth, any efFeds that 

 lition of an extraordinary caufe 



are, 

 req 



to a longer digreffion than is fuited to this pi 

 I fhall briefly ftate what appear to be the p 



c 



pal 



