inclined valleys, but these features pass quickly upstream 

 into shallow mature valleys. Such a valley upon examin- 

 ation is found to be enclosed within another shallow but 

 broader mature valley. Prom the valley divides, the 

 country around is observed to consist «»f numerous "valley 

 in valley" forms similar in appearance to the one just 

 vacated, the inter-valley ridges rising to the same general 

 . height and thus giving the appearance of a maturely dis- 

 sected peneplain. Sometimes the valleys are so broad and 

 shallow that one peneplain surface appears to have been 

 excavated out of another. Above these again rise many 

 residuals with which again are associated large and higher 

 fault blocks, whose surfaces are similar to those of the 

 lower plateau blocks just described. At an earlier stage 

 of the inquiry into the origin of the plateaus, some of these 

 faulted masses were considered at times as older peneplain 



An important fact may be stated at this stage, namely, 

 that the Main Divide has been determined in the main by 

 the position of the Pleistocene horsts. This fact will 

 receive fuller discussion later. 



After crossing the Main Divide the western aspect of the 

 plateau is entered upon and after traversing the unreduced 

 plateau masses for considerable distances the thalwegs are 

 observed to become suddenly steep; canon in canon forms 

 "- entered upon; the plateau becomes dissected by a net- 



work of ravines, the valleys grow 

 piles become separated more a 

 into insignificance, until they < 



A peculiar feature of some of the canons of the western 

 slopes of the Victorian and southern New South Wales 

 mountains is that their bases are deeply alluviated. 



