92 



VOLCANIC AREA OF EAST MORETON, ETC., DISTRICTS, Q., 



at Terror's Creek. It is a bluish, tonalitic granite, containing 

 numerous dark fine-grained inclusions; and intrudes the Gympie 

 rocks, as evidenced by great hardening and the injection of 

 pegmatite dykes. The graphic granite aplites of the Delaney's 



LAG UNA BAY 



JMORTH 

 HEAD 



ioojt 

 Shell Sands 

 Q 



Sand-to/i|ied Hills 

 .Ht c t<-oojt 



HELLS GATE 

 'it % Tn . it 20° 



HEAD 

 PACIFIC 



OCEAN 



N00 SA HEADS Q« q^UlU. 



G = Gra^(.te .' V = arsenic 3lI pyrites vem. 

 Fig. 13. -Plan of Noosa Heads. 



Creek and Fife's Range Mountains are probably the last differ- 

 entiation products of this mass. 



The age of the Neurum granite is Post-Carboniferous, probably 

 Permian. 



At Jimnah quartz-epidiorites are found. Similar rocks occur 

 at Delaney's Creek, Fife's Range, &c. Some of these may be 

 highly altered plutonic rocks of the gabbro family. 



(d) Hypabyssal Rocks. — Numerous dykes occur in connection 

 with the trachytes, pantellarites and comendites of the Glass 

 House Mountains, the rhyolites of Tinbeerwah, the Bottle and 



