352 C. A. SUSSMILCH. 



The group of kills referred to as apparently blocking the 

 course of the river to the north, are situated between 

 Bredbo and Oolinton. They are, as already pointed out, 

 residuals of the Mount Ainslie peneplain and form a sort 

 of bridge, stretching from the Tinderry to the Murrumbidgee 

 tablelands, and dividing the Oolinton Senkungsfeld into a 

 northern and southern portion. As this locality is ap- 

 proached, either from the north or from the south, the 

 Monaro peneplain narrows more and more and finally splits 

 up finger-like into a series of mature valleys. These 

 features suggest that this was at one-time a divide between 

 two river systems. Above and below this ridge the Mur- 

 rumbidgee winds sluggishly in a mature valley, but in 

 passing through it, as already described, it is confined in a 

 narrow gorge. The Monaro peneplain throughout the 

 Oolinton Senkungsfeld has a tilt from south to north — there 

 being a difference of about 1,000 feet between the southern 

 and northern ends. It has also a small tilt from east to 

 west. Taking all these facts into consideration it seems 

 probable that at one time, all that part of the existing 

 drainage area of the Murrumbidgee River, south from this 

 suggested old divide, formed part of the drainage area of 

 the Snowy River, and that the drainage from it flowed 

 through the wind gap which exists in the main divide, 

 where it is crossed by the Cooma-Berridale road. This 

 capture would have been made possible by the warping, 

 faulting, and tilting of the Monaro peneplain during its 

 uplift. 



J. Summary.— The Southern Tableland of New South 

 Wales consists of a number of fault-blocks produced by the 

 differential uplift of an extensive peneplain, this uplift vary- 

 ing in amount from 2,000 to 6,000 feet. The strains pro- 

 duced by this unequal movement developed a number of 

 faults, the more important of which have an approximately 

 meridional strike. During the uplift several portions of this 



