<1 



ILLUSTRATIONS OF THE 



the dilTolution of beds.of this fandftone, which 

 formerly covered the prefent, there can be no 

 doubt that this gravel is derived. But, as the 

 gravel is in general thinly difperfed through 

 the fandftone, and abounds only in forae of its 

 layers, it fhould therefore feem, that a vafl bo. 

 dy of (trata muft have been worn away and de- 

 compofed, before fuch quantities of gravel as 

 now exift in the foil could have been let loofe. 



337. I have faid, that a rock capable of afford- 

 ing fuch gravel as this, is not to be found in the 

 trad: of country juft mentioned. This, however, 

 is not ftridly true ; for in Worcefterfiiire, be- 

 tween Bromefgrove and Birmingham, about 

 feven miles from the latter, a rock is found 

 lifting of indurated ftrata, greatly eleva- 



/■ 



ted 



d 



th 



doubt 



prim 



from the 



detritus of which fuch gravel as we are now 

 fpeaking of might be produced. Thefe ftrata 

 feem to rife up from under the fecondary, where 



they are interfered by the road 



much as appears, are 

 that they cannot hav 



and, for as 



thicknefs. fo 



t of great 



fforded the materials of 



this gravel diredly, though they may have done 

 fo indiredly, or through the medium of the red 

 fandftone ; that is to fay, a primary rock of 

 which they are the remains, may have afforded 

 materials for the gravel in the.andftone j and this 



fandftone may in its turn have afforded the ma- 

 terial 



3 



