223 



THE GEOLOGY AND PETROLOGY OF THE GREAT 

 SERPENTINE BELT OF NEW 80UTH WALE8. 



Part vi. A General Account of the Geology and Physio- 

 graphy OF THE Western Slopes of New England. 



By W. N. Benson, D.Sc, B.A., F.G.S., Professor of Geology, 

 University of Otago, N.Z.; formerly Linnean Macleay 

 Fellow of the Society in Geology. 



(Plates xviii.-xx.; and ten Text-figures.) 



contents. 



Preface 



Historical Introduction 

 .Stratigraphy and Tectonics ... 



Regional Geology 



i. The Eastern Zone... 

 ii. The Serpentine Line 

 iii. The Near Western Zone 

 iv. The Middle Western Zone 



The Blue Knob Laccolite 

 V. The Far Western Zone . . . 

 vi. Upper Rockj' Creek and the Nandewar Mountains 



Physiography 



i. Features due to Diiierential Elevation 



ii. Features due to Volcanic Eruptions 

 iii. Features due to Differential Erosion 

 Evolution of the Manilla River-System 



Acknowledgments 



Bibliography 



Explanation of Plates 



223 

 224 

 227 

 228 

 228 

 233 

 238 

 250 

 259 

 264 

 271 

 272 

 272 

 273 

 274 

 275 

 280 

 281 

 283 



Preface. 

 Though the presence of Carboniferous and y)evonian rocks in 

 the northern portion of the Serpentine Belt has been recognised 

 for sixty years, very little was known till recently of their de- 

 limitation, subdivision, and tectonic relationships. In the first 

 of these articles, there is a brief statement of the subdivisions 

 and tectonic structure of the Palaeozoic rocks, together with an 



