GEOLOGY AND PETROGRAPHY OF THE PRoSPEGT INTRUSION. 445 



THE GEOLOGY AND PETROGRAPHY OP THE 

 PROSPECT INTRUSION. 



By H. Stanley Jevons, m.a., b.Sc, f.g.s., 

 H. I. Jensen, d.Sc, 

 T. Griffith Taylor, b.a., b.Sc, and 



0. A. SiJSSMILCH, F.G.S. 



[With Plates XXXIV - XXXIX.] 



[Read before the Royal Society of N. S. Wales, December 6, 1911.'] 



Part I. General Geology and Shape of the Mass. 

 By T. Griffith Taylor and H. Stanley Jevons. 



1. Introduction. 



2. Bibliography. 



3. General description of the mass. 



i. Shape of surface exposure. 

 ii. General idea of shape, 

 iii. General nature of the rock, 

 iv. Exposures. 



4. Shape and thickness of the mass. 



5. Manner and mechanics of intrusion. 



6. Age of the intruded mass. 



7. Depth of the intrusion. 



Part II. Petrography of the main mass and evidence of 

 differentiation. 



By H. I. Jensen and H. Stanley Jevons. 



8. General Petrology of the mass. 



9. Systematic descriptions of selected specimens. 



i. Reservoir Quarry, 

 ii. Emu Quarry, 

 iii. Other parts of the mass. 

 10. Characters of the original Minerals. 

 i. Felspars, 

 ii. Pyroxenes, 

 iii. Other minerals. ^*» t : ^ 



j^onian lnstit u 



C 1— Dec. 6, 1911. 



NOV T 1913 



