Vol. 60.] GLACIAL GEOLOGY OF TASMANIA. 53 



EXPLANATION OF PLATES VII & VIII. 



Plate VII. 



Sketch-map of the glaciated area around Mount Lyell, including the Gorman- 

 ston Moraine in the Linda Valley, on the scale of If miles to the inch. 



Plate VIII. 



Fig. 1. View of Mount Owen, the Linda Valley, and the Gormanston Moraine, 

 from the Eazorback : showing the glaciated aspect of the lower 

 northern slopes of Mount Owen. 

 2. View of Mount Owen, the Gormanston Gap, and the planed surface of 

 the Gormanston Moraine, from the hill beside the Mount-Lvell Mine 

 Offices. 



Discussion. 



Dr. "\V. T. Blanfoed called attention to the fact that the Author's 

 clear account of the Pleistocene glacial evidence in the Tasmanian 

 lowlands was an important addition to our knowledge of the 

 records left by the Glacial Period in the Southern Hemisphere ; 

 for instance, in New Zealand, in Tierra del Fuego and the neigh- 

 bourhood, and 011 the mountains of South-Eastern Australia. 

 Everywhere in the Southern lands the marks of ice-action resembled 

 those found in the Northern Hemisphere, and appeared to be of 

 about the same antiquity. 



Mr. C. F. Heathcote said that he had been acquainted with the 

 district described for more than 8 years. He quite agreed with the 

 Author that the previous evidence as to glaciation was unreliable : 

 he had studied the evidence himself, and was dissatisfied with it. 

 The continuous rains and the extremely-close growth of the 

 Tasmanian ' bush ' made geological work on the western coast of 

 that island a matter of cousiderable difficulty, and he congratulated 

 those interested in the Colony on their being now able to avail 

 themselves of the careful record of observations which the Author 

 had placed before the Society. 



Mr. P. F. Kendall remarked that it was fortunate that these 

 disputed points of Tasmanian geology had been studied by one so 

 well able to determine their merits as the Author. The phenomena 

 presented one peculiar feature : they indicated glaciation by ice- 

 sheets, not by valley-glaciers. The boulders had been brought 

 from great distances across a country of low relief ; nor was that 

 characteristic product of glaciation, boulder-clay, wanting. Glacia- 

 tion extending down to a few hundred feet from sea-level, in a 

 latitude corresponding to that of Madrid in the Northern Hemi- 

 sphere, was a very remarkable occurrence. Perhaps the very higli 

 rainfall of Tasmania had something to do with it. 



