MINERALOGY OF THE OCHILS. 



5 



ral exposure circumstances which embarrass the 

 mineralogist in no common degree. 



The dip of the strata, with very few exceptions, 

 is to the south-east, corresponding with the decli- 

 vities ; and the direction from north-east to south- 

 west, corresponding with the direction of the 

 whole group, which runs about half of its course 

 from east to west, and then, changing its direction, 

 runs from north-east to south-west. 



Springs are very numerous throughout the 

 whole of the Ocbil Hills ; in some instances they 

 form pools^ in others bogs, and in many they 

 unite and give rise to several beautiful small 

 streams, that meander through the neighbouring 

 districts. The Devon, the Allan, and the May, 

 r are the most remarkable of these streamlets ; and 

 they pour their waters into the Forth, the Tay, 

 and the Erne. 



The valleys are also numerous, separating the 

 several chains, and the individual heights from 

 each other. In general they ai^e narrow, not ex- 

 ceeding thirty or forty yards in width ; their 

 length depends on that of the chain, or mountain 

 which they bound. These valleys are most nu- 

 merous at |:lie western extremity of the Ochils, 



a3 



* Such is exhibited in the magnificent range of columns^ 

 which may be traced nearly from Craig-in-Crime t® Clacherf; 

 Crag. 



