78 



nections. The probable, consequence of an in- 

 creased acquaintance with the history of rocks, 

 will be to add more of these divisions to the now 

 circumscribed and irregular list. 



PRIMARY CLASS. 



UNSTRATIFIED. 



Granite. Serpentine. 



STRATIFIED. 



Gneiss. Quartz rock. 



Micaceous schist Red sandstone. 



Chlorite schist. Argillaceous schist. 



Talcose schist. Primary limestone. 



Hornblende schist. Compact felspar. 



Actinolite schist. 







SECONDARY CLASS. 



STRATIFIED. 



Lowest (red) sandstone. Limestone. 

 Superior sandstones. Shale. 



UNSTRAftFIED. 



Overlying (and venous) Pitchstone. 

 rocks. 



OCCASIONAL ROCKS. 



Jasper. Gypsum. 



Siliceous schist. Conglomerate rocks. 



Chert. Veinstones. 



