205 



8. The special features of the up-building and subsidence 

 of the Mount have been discussed in detail, and, finally, the 

 economic value of each important feature has been described. 



DESCRIPTION OF PLATE X. 



Fig. A. Portion of the Blue Lake, looking eastward. The 

 cliff on the far side shows clearly the level-bedded marine lime- 

 stones (1), and the stratified volcanic material (2), while portion 

 of the basalt flow separating these two series has been emphasized 

 by a broken line to show it more clearly. A thicker development 

 of the basalt may be seen on the left, just beyond the pumping 

 station. 



Fig. B. View of portion of Mount Gambier, showing the 

 Leg of Mutton Lake in the foreground, Tower Point beyond on 

 the right, with the Punch-bowl in the upper left-hand portion of 

 the picture. The tree-clothed ridge in the centre of the picture 

 separates the Leg of Mutton Lake from the Valley Lake, but the 

 latter is not visible; portion of Crater Lake may be seen at the 

 foot of the buttress that runs down from the Centenary Tower. 



(Photographs kindly lent by the Director, S.A. Tourist Bureau.) 



