288 CHLORITE SCHIST. 



Among the less essential minerals which some- 

 times enter into the composition of chlorite schist, 

 felspar, hornblende, mica, actinolite, and com- 

 pact felspar, sometimes abound so as to modify 

 its characters. Where the former is present it 

 passes into gneiss ; and the varieties which con- 

 tain the three latter are also enumerated in the 

 synopsis, as they form extensive rocks, of very 

 peculiar aspects, which seemed to merit that dis- 

 tinction. 



The best characterized specimens of chlorite 

 schist are of a greyish green hue ; and from that 

 colour, they vary, by an imperceptible transition, 

 to the more common pale grey of micaceous 

 schist. It may also be observed, that the green- 

 est specimens commonly present the greatest de- 

 gree of lustre. 



