PHYSIOGKAPHY OF THE SOUTHERN TABLELAND OF N.S.W. 337 



surfaces of all of these sections has arrived at the same 

 stage of development, indicates that they are separated 

 from one another by faults, and are therefore fault blocks 

 or horsts. 



I. The Yarrangobilly Fault Block. — The Monaro peneplain 

 has here an elevation of 4,000 to 4,200 feet. Residuals of 

 the older peneplains are not very numerous. The Tumut 

 River which drains this area is entrenched in a V-shaped 

 gorge about 3,000 feet in depth. The junction of this fault 

 block with the low lying country to the west has not been 

 examined, but viewed from a distance, the edge of it 

 appears to be a fault escarpment. From the higher Kiandra 

 fault block to the east it is separated by two faults hading 

 to the west and with a total throw of about 700 feet. The 

 road from Yarrangobilly to Kiandra passes over these faults, 

 a very steep grade on the road marking the position of the 

 fault scarp. The narrow strip of country between these 

 two faults shows the same topography as the surfaces of 

 the tablelands above and below. 



II. The Kiandra Fault Block* — On this area the Yass- 

 Canberra peneplain stands at an elevation of about 4,800 

 feet. Numerous residuals of the older peneplains occur, 

 of which the following are the more important : — 



Actual Approximate eleva- 



elevation. M tlon above * he 



Monaro peneplain. 



Bimberry Peak ... 6,264 feet ... 1,464 feet 



Half Moon Peak 

 Table top Mountain 

 Boboyan Peak 



Bald Hill 

 Round Mountain 



6,144 „ ... 1,344 



5,850 „ ... 1,050 



'81 „ ... 981 



76 „ ... 976 



5,755 ,, ... 955 ,, 



In addition to these many others ranging up to 5,600 feet 

 in altitude occur. The altitudes given above are those 

 supplied by the State Trigonometrical Survey chart. 



