26 T. S. Hall : Deposition of Bedded Tuf.s. 



What is true (jf these Vesuviaii tuft's is true of our Victorian 

 ones, and there is no need to cajU the agency of water to account 

 for their stratification. 



SUMMARY. 



1. The well-stratified tuffs of Mount Ganibier closely follow 

 the contour of hill and valley, and so could not have been deposit- 

 ed from water. 



2. There is no evidence of large bodies of water occurring at 

 different ages throughout Western Victoria, which would be re- 

 quired if the tuffs were subaqueous deposits. 



3. Consequently, all our stratified tuffs may be subaerial, and 

 not subaqueous formations. 



DESCRIPTION OF PLATE II. 



Cutting on road to Port Macdonnell, three miles south of 

 Mt. Gambler. The arch in the bedding of the tufts on the crown 

 of the liill is clearly visible. The small caves under the tuffs are 

 caused by the removal of the old surface soil by wind. The core 

 of the arch is formed of dune- rock. 



