GEOLOGY AND PETUOLOGY OF THE EXOGGERA 

 GRANITE AND THE AELIED INTRUSIYES. 



By W. H. BRYAN, B.Sc. 



Research .Student, Department of Geology. The 

 University of Queensland. 



Part I.— GENERAL GEOLOGY. 

 (Plates XI.-XII.) 



{Bead before the Royal Society of Queensland, November SOthy 



1914.) 



i . — ^Introductory . 

 The following paper aims at a general description of 

 the so-called " Enoggera Granite " and the intrusive rocks 

 lying to the immediate west of the city of Brisbane. The 

 relation of these to the other rocks of the area is pointed 

 out, and a suggestion made as to the probable age of the 

 igneous injections ; while the phenomena accompan^'ing 

 such injections are discussed, and the nature of the con- 

 trolling forces indicated. 



