190 



ME. T. W. E. DAVID ON EVIDENCE OE GLACIAL ACTION 



15. Evidence of Glacial Action in the Carbonifeeotjs and 

 Havykesbtjey Seeies, New South Wales. By T. W. Edg- 

 woeth David, Esq., E.G.S. (Read February 9, 1887.) 



Introdectoey. 



The series of rocks in New South Wales which are coal-bearing, 

 or intimately connected with the coal-bearing division, and are 

 referable to the Mesozoic and Palaeozoic eras, have been classed pro- 

 visionally by the Government Geologist, Mr. C. S. Wilkinson, F.G.S., 

 F.L.S., &c, as follows : — 



J Fresh water. 

 { 700 feet thick. 



f Fresh water. 

 1 800 to 1000 feet thick. 



( 



Triassic. 



Mesozoic. \ 



9. Wianamatta series. 



8. Hawkesbury series. 



Passage beds. 



7. Clarence series, includ- 1 



fng the Narrabeen > Fresh water, 

 series. J 



6. JSTewcastle series 



_ | Upper coal-measures. 

 Fresh water. 



Permian. 



f 



L u , mr j • f Middle coal-measures. 

 5. East Maitland series = 1 ^ n 



[ .bresh water. 



Paleozoic. ■{ 



Carboniferous. ■{ 



( 4. Upper Marine series = Branxton series. 



f Lower Coal-measures. 

 ~~ \ Fresh water. 



3. Greta series 



2. Lower Marine series. 



1. Lepidodendron-series = Fresh water. 



Evidence of ice-action has been observed in the Carboniferous 

 Marine series (No. 1), and phenomena which appear to be referable 

 to a similar agency in the Hawkesbury series (.No. 8). 



I. Caebonieeeous Glacial Beds. 



References by previous observers to Glacial Beds of Carboniferous 



age in Australia. 



The first description of boulder-beds in New South Wales, so far 

 as I am aware, is that given by the late Dr. T. Oldham*, quoted by 

 R. D. Oldham in the ' Records of the Geological Survey of India,' vol. 

 xix. part i. 1886, p. 43. With reference to the Carboniferous 

 marine beds at Wollongong, Dr. Oldham says : — " And still further, 

 many of the lower beds of the Australian group, there so abundantly 

 rich in marine fossils, are very similar to many of the beds in the 

 Indian Talchir series. There is the same mixture of pebbles and 



* Mem. Geol. Surv. India, vol. iii. p. 209. 



