338 C. A. SUSSMILCH. 



This fault block may extend as far east as the Murrum- 

 bidgee Fault immediately west of the Cooma Railway line, 

 but as this part of the tableland has not been ascended by 

 the writer, the matter must remain in doubt for the present. 

 Judging by the heights of the trigonometrical stations, 

 however, which occur hereabouts, it must be nearly, if 

 not quite as high as that part in the neighbourhood of 

 Kiandra. Should it be shown later that it stands at a 

 lower level than 4,800 feet, it might then be necessary to 

 consider it as a separate fault block, and as it is nearly 

 encircled by the Murrumbiclgee River, the name Murrum- 

 bidgee Fault Block would be appropriate. In any case it 

 is perhaps desirable to use the name Murrumbidgee Table- 

 land for this eastern area. The fault marking its eastern 

 boundary hades to the east, has a throw of at least 

 1,500 feet, and will be called in this note the Murrumbidgee 

 Fault. It continues as far north at least as Tharwa ; 

 followed in a southerly direction it passes just west of 

 Cooma, where its throw is only about 400 to 500 feet, and 

 then gradually dies out as the water-shed between the 

 Murrumbidgee and Snowy Rivers is approached. 



III. The Adaminaby Fault Block. — The road from 

 Kiandra to Cooma, soon after leaving the former town, 

 enters a series of gorges, and drops rapidly by a steep 

 descent to an altitude of about 4,000 feet at Perseverance 

 Flat. These gorges have been cut into what are probably 

 one or more fault escarpments separating the Kiandra 

 and Adaminaby tableland. From here, past Adaminaby, 

 to Rhine Falls the topography is similar to that on the 

 Kiandra tableland, in other words the Monaro peneplain 

 has here an altitude of about 4,000 feet. This fault block 

 is relatively narrow in an east and west direction, but 

 extends for many miles in a southerly direction, with a 

 somewhat decreasing altitude. Where the Cooma-Jinda- 



