164 W. G. WOOLNOUGH. 



considerable size. Some of these are distinctly glaciated 

 and no doubt, a careful search would reveal many such. 



At Stony Creek, about Portion 156, Parish Kullatine, the 

 road cutting exposes a splendid section of the same form- 

 ation. Here the chocolate groundmass is crowded with 

 sharply angular rock fragments, mostly of small size, but 

 contains abundant large erratics, scattered through it, 

 singly or in groups. These erratics consist mostly of 

 granites and reddish quartzites, and do not, so far as I have 

 observed, show any examples of the hard tuff to be described 

 presently. One of the erratics from this locality, a boulder 

 of quartzite about 12 inches long by 8 inches in diameter 

 is beautifully glaciated. This occurrence of till lies in the 

 same position with respect to the limestone belt as that at 

 Sebastopol. 



There can be no reasonable doubt that we are here deal- 

 ing with a new and very extensive development of the 

 Lochinvar Glacial Beds of the Hunter Valley, described by 

 Professor David. x In the type district these Glacial Beds 

 form the base of the Permo-Oarboniferous System, and rest 

 unconformably on Rhacopteris Beds belonging to the Car- 

 boniferous System. 



The great interest and importance of the Upper Macleay 

 Permo-Oarboniferous is that the Glacial Beds do not appear 

 to be the basal beds of the system, but seem to be under- 

 lain by a great, but at present undetermined, thickness of 

 conformably bedded tuffs. In Parabel Creek these dip N. 

 10° W. at 25°. The continuity of the section is not all that 

 could be desired, as the wide valley of Parabel Creek 

 intervenes between the Glacial Beds and the nearest out- 

 crop of the tuff to the souths but the first beds of the latter 

 which are met with in that direction conform pretty closely 



1 Discovery of Glaciated Boulders at Base of Permo-Carboniferous 

 System, Lochinvar, N.S.W., Prof. T. W. E. David, this Journal, Vol. 



XXXIII. 



