MICACEOUS SCHIST, 279 



SECOND DIVISION. 

 Compounded of three or more ingredients. 



A. Micaceous schist of many of the preceding- 

 varieties, containing hornblende in minute crystals, or 

 in larger crystals or concretions. 



This is not uncommon in Perthshire. 



B. The same, containing felspar, and Jhus pass- 

 ing into gneiss ; already alluded to under a preceding 

 head. 



C. Containing chlorite or talc superadded, and 

 thus passing into chlorite schist, or talcaceous schist. 



D. Irregularly compounded with more than one 

 of the above-named ingredients, so as to pass out of 

 the arrangement. 



E. Micaceous schist, containing carbonat of lime 

 in addition to the ordinary ingredients; that substance 

 so much resembling felspar, that the rock is easily 

 mistaken for gneiss. 



This variety seems limited and rare. Ob- 

 served in Perthshire only. 



THIRD DIVISION. 



Conglomerated. 



Containing superadded fragments of granite, 

 fjuartz rock, limestone or other substances. 



