THE GEOLOGY AND PETROGRAPHY OF THE CLARENCETOWN- 

 PATERSON DISTRICT. Part i. 



By G. D. OsBOR>7E, B.Se., Deas-Thomson Scbolar in Mineralogy, and Science 

 Research Scholar in Geolog-y (1921), The University of Sydney. 



(Plate xxvi., and sis Text-fig-ures. ) 



[Read 31st May, 1922.] 



General Sequence of Carboniferous Rocks in Lower 



Hunter District 162 



Detailed Stratigraphy of the Clarencetown-Paterson 



District 163 



;. The Burindi Series 164 



ii. The Kuttung Series 166 



Regional Geology — 



i. The Burindi Series ...... 184 



ii . The Kuttung Series 185 



Intrusive Igneous Rocks 194 



Cainozoic Rocks 195 



Introduction. 



The last ten years have witnessed quite a considerable amount of detailed 

 geological investigation upon the Carboniferous rocks of New South Wales. 

 Prior to 1911, the literature on the Carboniferous System, with the exception of 

 numerous i.uportant palaeontological papers (see Benson, 1921, pp. 12, 13, 14, 

 26), was chiefly of economic and commercial interest (cf. Jaquet, 1901, p. 63 and 

 Sussmilch and David, 1919, p. 219), and investigations into the detailed strati- 

 graphy were only pursued in so far as it was necessary to make possible the 

 determination of the mode of occurrence, horizon and extent of economic de- 

 posits. But from 1911 to the present time, pure research has been carried on to 

 such an extent that there is now a firm foundation for further work upon either 

 the type areas or other districts of Carboniferous rocks. 



Without giving a detailed historical account of the work performed on the 

 Carboniferous System during the decade in question, it is necessary to consider 

 briefly the progress of this work as a jDreliminary to the discussion in the fol- 

 lowing pages. 



The main workers in this connection during the past ten years have been 

 Prof. Benson, Mr. W. R. Browne, Prof. David, Messrs. W. S. Dun and C. A. 

 Sussmilch, and Dr. A. B. WaUiom. Prof. Benson described, in 1913 and 1917, 

 the Carboniferous succession along the western slopes of the New England 

 Plateau instituting the term "Burindi Series" for the lower marine portion of 

 the Carboniferous (Benson, 1913, pp. 503-508, and Benson, 1917, pp. 264-270) and 



