54 T. W. E. DAVID. 



Permo-Oarboniferous Basin striking at first N. by W. then 

 bending northwards into a N. 30° W. direction. They too 

 dip in towards the trough of the Permo-Carboniferous Basin. 

 In Queensland the Star Beds of this age build a large por- 

 tion of the old Main Divide, and their folds curve mostly 

 in sympathy with the coast line. Immense intrusions of 

 serpentine, like those of Marlborough N. of Rockhampton 

 in Queensland, Nundle to Bingara in New South Wales, the 

 Wellington area in Victoria, the serpentine regions in N.W. 

 of Tasmania, etc., took place during this period. 



Permo-Carboniferous. — In Tasmania the open end of the 

 V became filled with Permo-Oarboniferous sediments. In 

 Victoria and South Australia the earliest strata of this age 

 were formed by ice moving from a general southerly direc- 

 tion, from the old highland Divide which seems to have still 

 survived since Cambrian times, lying considerably south of 

 Kangaroo Island and south of part, at all even ts,of Tasmania. 

 During this period one of the greatest warps of which we 

 have record in the Australian region in Palaeozoic time 

 developed from near Sydney as the centre of the trough, 

 N.N.W. into Queensland, as least as far as Townsville, and 

 probably still further north under what is now the region 

 of the Great Barrier Reef. At this time Eastern Australia 

 was probably, from New England to Townsville, isolated 

 from the portion lying further to the west, first by the 

 Permo-Oarboniferous sea, and later by the lakes and swamps 

 of that period. A large portion of Northern Territory, the 

 great desert south of Kimberley in West Australia from 

 near North-west Oape in the north to the Oollie Coal-field 

 in the South, was overspread with Permo-Oarboniferous 

 marine, or glacial, or swamp sediments. With the intru- 

 sions of granite in Victoria, Tasmania, New South Wales 

 and Queensland, the new trend lines of the modern Main 

 Divide were outlined, and in Victoria a strong east and 



