PRESIDENTIAL ADDRESS. 47 



30° S., with a throw to N. 30° E., and the Laing's Fault strikes 

 N.N.W. to N.W., with a throw towards N.B. 



An important tectonic structure to the south of Princess 

 Charlotte Bay, to the north-west of Oooktown is the sen- 

 kungsfeld of the Little River Coal-field. This strongly 

 marked trough is well figured by Dr. R. L. Jack. 1 The 

 indent iu the coast at Princess Charlotte Bay is probably 

 of tectonic origin. A significant fact in the structure of 

 the unit of the Main Divide of Queensland is the newness 

 of the folding and faulting. In the southern part of New 

 South Wales the Permo-Carboniferous strata are simply 

 thrown into broad undulations. In the New England 

 district they are strongly folded and altered by granites. 

 At Gympie they are much disturbed and considerably 

 altered in places. About five miles north-west of Gympie 

 specimens of Protoretepora occur completely replaced by 

 stibnite. 2 



The Trias-Jura Coal-measures of the Styx River at 

 Broadsound are thrown into broad folds, and at Maryborough 

 the Maryborough Beds, classed by R. Etheridge as of 

 Upper Cretaceous age, dip at angles varying from 7 - 12° up 

 to 30-45° on the Isis River, as recorded by W. H. Rands. 3 

 The general dip is north-easterly. Nowhere else in Aus- 

 tralia, as far as I am aware are strata as new as Upper 

 Cretaceous so much disturbed, as in the above district. 

 The comparatively recent character of the volcanic erup- 

 tions in the Cairns district is proved by the crater lake 

 surrounded by scoria described by Mr. Meston, Lake 

 Eacham. 4 The great submarine volcanoes perhaps the 

 largest, which have as yet been discovered in the Australian 



1 Eeport on the Little Eiver Coalfield. By authority, Brisbane, 1882. 

 8 Geology and Palaeontology of Queensland and New Guinea, Jack and 

 Etheridge. By authority, Brisbane, 1892, p. 83. 



3 Report on the Burrum Coal-field. By authority, Brisbane 1896. 



4 Geol. and Pal. etc. supra, p. §87. 



