BY E. C. ANDREWS. 501 



characteristic appearance in the less reduced central areas, the 

 author has named this now elevated plain the " Upland Valley 

 Level."* Its age is probably Miocene or even Pliocene in part. 



(g) A gentle elevation of the "Upland Valley" Level closed this 

 stage, and a series of broad, shallow, and well-matured valleysf 

 were developed in the "Upland Valley" Level (Plate xli.). 



(h) Then came the great elevation of Eastern Australia. The 

 movement was differential and varied in the central areas from 

 2000 to 6000 feet. Large flexings and faults accompanied the 

 movement, as at Lapstone Hill, \ Kurrajong,| near Armidale,§ 

 Guy Fawkes,§ Tingha,§ Kosciusko and Kiandra.§ The move- 

 ment was of an excessively slow nature, since the streams were 

 simply revived and not turned out of their courses even when 

 hard structures were warped athwart|| their direction of flow. 

 [In warped areas also, as in New England, the canons are seen 

 retreating along their old matured valleys (PI. xli.).] The move- 

 ment is youthful, since the eastern canons resulting from such 

 uplift have not yet reached the central plateau, but head along 

 their old well-matured tracks in gigantic waterfalls (Pl.xl.). On 

 the western slope the stream channels, however, as a result of 

 comparative aridity and terrific storms of rare occurrence, have 

 approximated already to the graded stage. 



(i) In historical time a movement of subsidence, amounting to 

 several hundreds of feet, affected the whole eastern coast of 

 Australia. 



(j) A vibration of elevation^! marked the latest of these Eastern 

 Australian movements. 



(k) A period of stable equilibrium has succeeded to the very 

 recent elevation. 



* For this term I am indebted to the work of Prof. A. C. Lawson mentioned 

 in the list of authors supplied at the end of this note. 



t Rarely do these valleys exceed 300 feet in depth. 

 J T. W. E. David, (a) pp.359-370. 

 § E. (J. Andrews, in preparation. 



ii E. C. Andrews, (c) pp. 812. 

 IE. C. Andrews, (e) pp.. 815-824. 



