760 E. C. AXDREWS 



sediments at Kimberley (Northwestern Australia), which are said to 

 possess a strike almost northeast and southwest, and a dip of 70 , 

 while so-called Carboniferous sediments lying immediately above 

 are almost horizontal. 



Carboniferous. — Benson's great contribution concerning the 

 conformability of the Carboniferous with the Devonian in North- 

 eastern New South Wales allows us to infer that the Devonian south 

 of lat. 2>S° S. was folded prior to the tilting of the New England 

 Devonian, and it suggests also that not only Middle Devonian but 

 also Upper Devonian is to be expected in this New England series. 



Permo-Carboniferous.— -The Permo-Carboniferous period was a 

 most interesting one in Australia, but only the salient points dealing 

 with its history are here recorded so far as they deal with the main 

 thesis of this report. 



A great period of submergence is indicated over wide areas 

 throughout peripheral Australia, but the strong folding to which 

 certain sediments of this age were subjected at the close of the sedi- 

 mentation was confined to a relatively narrow area within Eastern 

 Australia north of the Hunter River, lat. 33 S. Thus the sedi- 

 ments of this age in Tasmania and Western Australia are almost 

 horizontal; in Victoria they appear to be flexed only in the neigh- 

 borhood of Tertiary faults or monoclinal folds; in Southeastern 

 New South Wales they exhibit corrugations scarcely recognizable; 1 

 in the coastal region 100 miles north of Sydney they are moder- 

 ately domed, 2 whereas to the west and southwest they are almost 

 horizontal. 3 In Northeastern New South Wales, as shown by 

 Carne, Woolnough, and the writer, the Permo-Carboniferous sedi- 

 ments are much folded and intruded by granite, whereas at a dis- 

 tance of 200 miles to the west the strata lie almost flat. In Southern 

 Queensland the Permo-Carboniferous is intensely folded, as men- 

 tioned elsewhere in this report. 



1 E. C. Andrews, "Yalwal Gold Field," Mineral Resources Xo. g, Dept. Mines, 

 X.S. Wales, 1901; L. F. Harper, "The Southern Coal Field," Memoir Xo. 7, Dept. 

 Mines. X.S. Wales, 1916. 



J T. W. E. David. "The Hunter River Coal Measures," Memoir Xo. 4, Dept. 

 Mines, X.S. Wales, 1907. 



J J. E. Carne, "Western Coal Fields," Memoir Xo. 6, Dept. Mines, N.S. Wales, 

 190S. 



