460 CONGLOMERATE OF THE GRAMPIANS* 



and some calcareous particles. This cement does 

 not produce a very strong degree of adhesion. 



The conglomerate in this district does not, as 

 that on the Grampians, rest upon the old red sand- 

 stone, it here rests upon the older rocks of lime 

 and blue clay-slate. 



To shew how widely disseminated this water- 

 worn composition is, one more example shall be 

 here given. Near the mouth of Loch Tongue, 

 upon the north-west coast of Sutherland, I found 

 that a small island of the name of Rona was en- 

 tirely composed of it. The conglomerate of this 

 island is entirely similar in composition, in ce- 

 ment, and in position, to that of the Grampians, 



/ 



