AUSTRALASIA, NEW GUINEA, AND NEW ZEALAND 761 



Farther north, as, for example, at Gympie 1 and Mount Morgan, 2 

 the sediments are strongly folded and are Permo-Carboniferous 

 in age. Along the north coastal area of Queensland there is a very 

 long belt of sediments which are highly contorted and which appear 

 to be Permo-Carboniferous. 3 Nevertheless, less than 100 miles 

 inland the Permo-Carboniferous 4 dips at an angle of 12 only. All 

 this indicates that the close of the Permo-Carboniferous period 

 was accompanied by a strong folding movement in areas north and 

 slightly east of the areas affected by the great closing Carbonif- 

 erous movement in New England. Additional evidence of this 

 is adduced when dealing with the regions of ore deposition in 

 Australia. 



The strikes of these foldings may be considered as subparallel 

 to the Carboniferous lines of Benson, namely, northwest to north- 

 northwest. 



It may be pointed out here also that the area of Permo- 

 Carboniferous sediments in Tasmania, South Australia, and 

 Western Australia is very large; nevertheless the beds there are 

 horizontally bedded. 



Trias-Jura. — In this period there appears to have been a tend- 

 ency for the old heavy, or negative, area of Central-Eastern Australia 

 to sag again, or for the long zone of weakness separating New Eng- 

 land from the land to the west and south to be broadened. In the 

 northeastern portion of New South Wales and in Southern Queens- 

 land another area of sagging received a great thickness of Trias- 

 Jura sediments. 



The geographical conditions under which the two sets of sedi- 

 ment were deposited differed in certain well-marked features. This 



1 Jack and Etheridge, Geology of Queensland (by Authority), 1892, pp. 72-84. 

 B. Dunstan has also produced detailed geological maps of this area in a late number of 

 the Queensland Survey Publications. 



3 Jack and Etheridge, Geology of Queensland, p. 598. 



3 Lionel C. Ball, "Wolfram, Molybdenite, and Bismuth at Bamford, Northern 

 Queensland," Queensland Mining Journal, 1914, p. 568. Mr. Ball has made a more 

 definite statement as to the Permo-Carboniferous age of the beds in this district in a 

 recent communication to the writer. 



4 J. H. Reid, "Permo-Carboniferous at Bett's Creek," Queensland Government 

 Mining Journal, July, 1914, pp. 408-12. 



