818 ON THE METAMOEPHIC AND OVERLYING ROCKS OE LOCH MAREE. 



highly metamorphosed condition, but a gradual change. The Scotch 

 surveyors, he believed, even hoped to be able ultimately to identify 

 in detail the rocks of the Northern Highlands with the sub- 

 divisions of the Southern Uplands. 



Dr. Hicks stated that his section was only meant as a rough dia- 

 grammatic one, but he would maintain its general accuracy. He 

 showed that similar difficulties to those mentioned by Mr. De Ranee 

 existed even in Sir Roderick Murchison's section. The part which 

 Prof. Ramsay had chiefly objected to, as he had explained in his 

 paper, was obscure and probably faulted, and the section exaggerated 

 the difficulties. That there was an unconformity was evident from 

 sudden change in lithological characters and in the strike of the 

 beds, which he could not otherwise explain. The great mass of 

 rocks forming Ben Eyn could not be explained, as Prof. Ramsay 

 appeared to think, by minor faults. If they were Lewisian, so must 

 much of the Northern Highlands be. 



