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GEOLOGY OF THE VOLCANIC AREA OF THE EAST 



MORETON AND WIDE BAY DISTRICTS, 



QUEENSLAND. 



By H. I. Jensen, B.Sc, Linnean Macleay Fellow of the 

 Society in Geology. 



Synopsis. 

 Part i. Physiography and General Geology. 



(Plates v., v.fo'.s.-x. ) 



i. Introduction 

 ii. Physiography and Tocography — 



(a) The Coastal District 



(6) The D'Aguilar Eange 



(c) The Woodford Peneplain 



(d) The Blackall Range 



(e) The Maroochy Volcanic District 

 (/) Cooran and Neighbourhood ... 



iii. General Geology — 



(<i) Metamorphic Rocks 



(b) Sedimentary Rocks 

 (e) Plutonic Rocks 



(d) Hypabyssal Rocks 



(e) Volcanic Rocks 



(/) Folding and Faulting 



iv. Tektiary Changes of Sea-level 

 v. Conclusion 



Part ii. Petrology. 



(Plates xi.-xvi. ) 

 ('0 Metamorphic Rocks 

 (I>i Sedimentary Rocks 

 (c) Plutonic Rocks ... 



(</) Hypabyssal Rocks ... ... ... 



(e) Volcanic Rocks — 



(a) Rhyolites ... 



(b) The Trachytes, Comendites, and Pantellarites 



(c) The Andesites 



(d) The Basalts 



(e) Tuffs 



Conclusion 



5 a 



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