TS CABBOiSIEEEOrS AXD HAWKESBEEY SERIES, N, S. WALES, 195 



rents. . . . These boulder accumulations occur in irregular patches 

 apparently throughout the Hawkesbury series." 



This series is fresh water or estuariue, classed on stratigraphical 

 and palasophytological grounds as Triassic, and cannot therefore be 

 correlated with the Wollongong or Bowen-river series. 



2. Contemporaneously contorted Current-bedding. 



The author is not aware that any description has yet been pub- 

 lished of this remarkable structure, so frequently seen in the current- 

 bedded sandstones of this series. The nature of this structure is 

 shown on the accompanying figure (p. 19-ij. That the crumpling of 

 the beds was contemporaneous is evident from the undisturbed 

 character of the overlying current-bedded sandstones. 



The contortions have evidently been caused by some extensive 

 lateral thrust, such as would be produced by the grounding of 

 floating ice ; but more extended observation will be necessary ere 

 this can be demonstrated. 



Xote. 



Ice-action in Siluro-Devonian beds in New South Wales. 



Two miles north of the town of Temora, lLr. Wilkinson reports 

 the occurrence of gold-bearing conglomerates, which he believes are 

 of Siluro-Devonian age. The boulders are much rounded, polished, 

 and in some cases striated. The blocks consist chiefly of quartz 

 imbedded in a clayey base • the largest have a diameter of 4 feet. 



Drscrssiox. 



llr. CpvTjttwell dissented from Mr. David's classification of the 

 Australian Coal-beds. He thought the Wianamatta and Hawkes- 

 bury beds equal the ILymyddyslwyn and Pennant beds (Upper 

 Carboniferous; of South Wales. He considered the appearance of 

 glacial action due to agencies still prevalent in Australia, such as 

 the effect of melting snow and floods in the higher Cordillera. 



Prof. Boyd Dawkixs considered the evidence required further 

 inquiry. Striated pebbles were not alone sufficient evidence of 

 glacial action, they might be produced by earth-movements after the 

 consolidation of rocks. The speaker could see nothing distinctly 

 glacial in the specimens exhibited. 



He also sympathized with the doubts expressed by the last 

 speaker as to the classification of the rocks adopted by lLr. David. 

 He could detect no break in the sequence, and he had found Glos- 

 sopteris to the west along with Lepidodendroid plants of Mount 

 Victoria. 



One of the specimens on the table was from Old Red Conglo- 

 merate, striated by earth-movements. He asked for information 

 about the Punjab specimens exhibited. They had a singularly 

 artificial appearance. 



Mr. (toodchild said the stone from the Upper Old Peed was from 



