342 



C. A. SUSSMILCH. 



firmation. The Monaro 

 land has an elevation of 

 of the older peneplain 

 following : — 



peneplain on the Kosciusko table- 

 at least 6,000 feet with residuals 

 rising above it, and include the 





Altitude 



Approximate height 

 above Yass-Can- 

 berra peneplain. 



Mount Kosciusko 



7,328 feet ... 1,328 feet 



Mount Townsend 



7,260 , 



1,260 „ 



Gungartan 



6,776 , 



776 „ 



Big Bogong 



6,755 , 



775 „ 



Ram's Head 



6,600 , 



600 „ 



Mount Clarke 



7,000 , 



1,000 „ 



The Perisher 



6,550 ,. 



550 „ 



Mount Etheridge 



7,000 , 



1,000 „ 



F. The Senkungsfelder.— These consist of relatively 

 narrow portions of the Yass-Oanberra peneplain, which 

 during the elevation initiating the existing cycle of erosion, 

 were elevated less than their immediate neighbours, they 

 thus appear now as depressed segments. It is unlikely 

 that these two areas have suffered any actual subsidence, 

 their relatively lower elevation being the result of their 

 lagging behind during the differential uplift of the whole 

 region. If subsidence of these two areas, however, did 

 follow elevation, it must have done so immediately, i.e., 

 without any considerable interval of time between the up- 

 lift and subsequent subsidence. In either case it is con- 

 venient to call these relatively depressed segments — 

 Senkungsfelder. 



I. The Jindabyne Senkungsfeld. — This has a general 

 elevation of just under 3,000 feet, it is bounded on the west 

 by the Kosciusko fault block (6,000 feet high), and on the 

 east by the southern extension of the Adaminaby fault 

 block (3,700-4,000 feet high). At Jindabyne it is only a 

 few miles wide and might be mistaken for a valley of erosion, 



