Uiattz ill Basalt. 



125 



The mount itself is a volcanic cone, built of scoriaceous material, 

 and with a well-preserved broached crater, the breach being to the 

 north-west. It cannot be said for certain that the lava in the 

 southern part of the area came from Mount Greenock; it may be 

 from Mt. Mitchell, some four miles further south. The probability 

 is, however, that it is mainlv from Mount Greenock. 



Ordcvician hi lib. 



BASaJf. Mines. 



Fig. 1. Sketch map of the Mount Greenock area. A and JB are specially 

 referred to in the text. The cycles represent mines following- the 

 buried leads. 



