ON THE VICINITY OF LOCH-LOMOND. S99 



traced in so many places, skirting the Highlands 

 from S. W. to N. E. 



Near Rossdoe, we have grey-wacke, and a mi- 

 neral approaching grey-wacke-slate. These rocks 

 are succeeded, towards Glen-Fruin, by the old red 

 sandstone, in which we observe fragments of 

 quartz, clay-slate, flinty-slate, felspar, &c., and 

 which occurs also intimately mixed with lime, so 

 as to form a species of clay-limestone. It is seen 

 cropping out on the road near Cameron, and con- 

 tinues to the neighbourhood of Dunbarton, where 

 there seems to be a second sandstone formation, 

 deeply coloured with iron-ochre. All these suc- 

 cessive rocks descend in their level and out-goings, 

 agreeably to the System, till we reach Dunbar- 

 ton, at which the strata are horizontal, or near- 

 ly so. 



In the course of this examination, which has 

 added another example to the many illustrations 

 already existing, of the Wernerian Geognosy, 

 I found no traces of metallic ores ; nor was I so 

 fortunate as to discover any imbedded individual, 

 or valuable minerals, worth remarking, so that, to 

 judge from what occurred to my observation, this 

 part of the Highlands is probably more interesting 

 to the admirer of natural scenery, than to the 

 mineralogist. 



I shall now conclude this notice, with a remark 

 or two, suggested by the phenomena of the rocks 

 it describes. 



