V OF K.YSTKRX ArsTRALIA. 445 



channel was locally warped below the Sydney level. ;I! ,,| 

 thus was forced to enter the eastward flowing Uawkeshury. 

 Even in that case the river must have cut its eastern canon 

 as quickly as the land rose against it, otherwise it would 

 have formed a lake entering the sea near Sydney. 



This brings us also to the nature of the movements of 

 the Kosciusko Period, namely, a slow and intermittent 

 one whereby strong rivers could hold their own courses 

 against gentle uplift and thus be rejuvenated from time 

 to time. It is not certain that this " Plateau Period " is 

 yet finished. Certain it is that a pronounced submergence 

 of the coast has taken place within the Human Period, that 

 a slight elevation has again been imposed upon the sub- 

 mergence and that at present a period of stable equilibrium 

 appears to be in progress, but the whole topography points 

 to the conclusion that the great Plateau Period is not yet 



and south course from Kiandra past Kosciusko and Jinda- 

 byne. Thence past Dalgety it wanders away from a 

 meridional direction for many miles only to return to the 

 north and south course which it thence maintains to the 

 sea. If we consider the Eucumbene as the main Snowy 

 (which indeed it is when geographically considered, because 

 the channel base of the Snowy is hung above that of the 

 Eucumbene at their point of junction) it is seen that the 

 Snowy heads in a faulted plain 5,000 feet above sea level. 

 The Murrumbidgee lies in the northern continuation of this 



areas of the two streams. At Kiandra the Snowy flows 

 through a narrow gorge which enters the plateau of the 

 Rocky Plain and Paradise Flat some miles lower down 

 stream. 1 The depth of this young gorge is a measure of 



