138 Dr. Mac Culloch's observations on the Mountain Cruacban, 



although, from the circumstances already mentioned, that separa- 

 tion is in many cases independent of it. It is far beyond the 

 bounds of this paper to pursue further the very interesting circum- 

 stances under which the whole of this formation of trap appears j 

 and I shall probably take some future opportunity of entering at 

 large into its history. I shall here therefore terminate these miscel- 

 laneous remarks, which appeared to me necessary to illustrate the 

 description of Cruachan. 



