PHYSIOGRAPHY OF THE SOUTHERN TABLELAND OF N.S.W. 341 



graphy of this area : — "A late Tertiary peneplain formed 

 of granite, gneissic rocks and schists was uplifted to a 

 general level of 3,000 feet above the sea. From Cooma 

 towards Kosciusko a further upward warping took place 

 which lead to the peneplain acquiring an inclination towards 

 the north and east ; this gave the Snowy River its original 

 N.N.E. trend near its source. As the warping progressed, 

 and the earth's crust towards the S.E. of the Kosciusko 

 plateau was put in tension, shearing followed, resulting in 

 the great fault along the Thredbo Valley. Cross-faults 

 also developed at Pretty Point and along Diggers' Creek, 

 marked now by a strong feature as well as freshwater 

 springs and probably also at Sawpit Creek. Possibly another 

 fault may have formed on the S.E. side of the Snowy 

 Valley producing a long, narrow trough, possibly a lake 

 may have been produced at the bottom of the trough, and 

 the remarkable gravel banks to be seen two miles to the 

 S.E. of the accommodation house on the Thredbo may be 

 of lacustrine origin and antedate the cutting down of the 

 rocky bar below Jindabyne. The fault with its easterly 

 throw at Barney's Ridge, which may have given origin to 

 Lake Coolamatong, may have formed about the same time." 



In the writer's opinion the faults referred to as occurring 

 at Pretty Point, Diggers' Creek and Sawpit Creek un- 

 doubtedly exist. Tliey hade to the east and have a com- 

 bined throw of at least 3,000 feet. These fault escarp- 

 ments form the eastern edge of the Kosciusko fault block, 

 separating it from the Jindabyne Senkungsfeld. Another 

 great fault or series of faults separates the Kosciusko 

 tableland from the lower lying country to the west. The 

 northern and southern limit of this tableland have still to 

 be determined. From a distance the Kosciusko and Kiandra 

 fault blocks seem to be distinctly separated from one another 

 with lower country lying between, but this requires con- 



