MINERALOGY OF THE OCHILS. 



21 



rocks, in the order of the strata in which they oc- 

 cur. Contemporaneous veins are not uncommon 

 in the clinkstone and greenstone ; but true veins 

 are more rare. The following is the order of the 

 latter : 



1. Calcareous spar. 2. Steatite. 

 3. Heavy-spar. 

 4. Iron. 5. Cobalt. 6, Silver. 

 7. Copper. 8. Lead. 



Calcareous Spar, 



Highly crystallised varieties of the calcareous 

 spar traverse the clinkstone, near Woodhaven, 

 and the claystone near to the Rumbling Bridge. 

 It has a greenish tint, and all the usual characters. 

 The dip and direction not easily determined. The 

 thickness from half an inch to tw^o inches. 



Steatite. 



Veins of this steatite, varying from one to two 

 inches, divide the strata of the clinkstone, and of 

 the greenstone, at the section above Wester toun 

 and Alva. They occasionally contain iron-pyrites 

 crystallised, in cubes, in considerable quantities. 



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