320 



THE GEOLOGY AND PETROLOGY OF THE GREAT 

 SERPENTINE BELT OF NEW SOUTH WALES. 



Part vii. The Geology of the Loomberah District and a 



PORTION OF the GoONOO GoONOO EsTATE. 



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

 AND Mineralogy in the University of Otago, N.Z., late 



LiNNEAN MaCLEAY FeLLOW OF THE SOCIETY IN GeOLOGY. 



With two PALiEONTOLOGicAL Appendices by F. Chapman, 

 F.R.M.S., A.L.S., Palaeontologist to the National 

 Museum, Melbourne. 



(Plates xxxi.-xxxviii., and five Text-figures). 



contents. page 



Introduction AND Acknowledgments 320 



Previous Literature 322 



Physiography 323 



General Geology: — Comparison of Stratigraphical Succession in 



Tam worth, Loomberah, and Nundle Districts 324 



Regional Geology — 



Devonian Sedimentary Rocks ... ... ... ... 327-341 



Devonian Igneous Rocks ... ... ... ... ... 341-345 



Igneous Rocks of the Western Series 345-352 



General Summary of the Devonian Stratigraphical Succession ... 352 



Petrology 363 



Bibliography 382 



Introduction and Acknowledgments. 

 In previous papers of this series, the writer has described and 

 given geological maps of the Districts of Nundle and Tamworth 

 (1, 3, 5, and 6). The former was the first studied, and broad sub- 

 divisions only were made in the stratigraphical succession. In 

 the latter, every zone of rock of any importance was mapped, in 

 the endeavour to obtain as detailed a knowledge as possible of 



