438 ' E. C. ANDREWS. 



In north Queensland the whole coast from Hinchinbrook 

 Island to Cooktown has been strongly faulted or flexed 

 beneath the sea, and so recently has this occurred that 

 the powerful streams of the Barron, Johnson, Tnlly and 

 related rivers have only succeeded in cutting their profound 

 canons to distances of from 20 to 30 miles from the sea. 

 The Bellender Ker Ranges appear to represent a horst in 

 this region. Such faulting action parallel to the coast is 

 probably not older than closing Tertiary. 



In passing on from this brief mention of a few of the 

 more important topographic faults of the eastern Australian 

 highlands, it may be advisable to call the attention of 

 physiographers to the ricli harvest of information [with 

 regard to faulting and flexing] which is to be reaped from 

 a careful study of Tasmania, the Victorian Alps, the south- 

 eastern corner of New South Wales, eastern New England, 

 the southern Darling Downs area, and the coastal area lying 

 between Townsville and Cooktown in North Queensland. 



(7) Plateau dissection hi) st reams.— By this subheading 

 the amount of dissection only is indicated which the 

 plateau lias suffered by stream action since the last import- 

 ant uplift. The broad and shallow mature valleys, which 

 mildly roughen the upland surfaces themselves, are not 

 considered in this connection as they belong to the pre- 

 Kosciusko Period. 



(a) Depth of dissection.— We infer that the uplift of the 

 plateaus has been considerable, because of the great depths 

 of the canons trenching their surfaces. A few instances, 

 from the many known to the writer, of the depth of the 

 dissection attained may he quoted at this stage. 



The plateau surface of the Big Bogong in Victoria is 

 6,500 feet high, while the channel of the Kiewa as it leaves 

 the mountain is only 1,500 feet above sea level. 



