Vol. 60.] GLACIAL GEOLOGY OF TASMANIA. 41 



i after the discoverer of glacial action in Tasmania.' ' Moore also 

 found, on the western slope of the West-Coast Range, a series of well- 

 preserved moraines ; some of them lay beside the western ends of the 

 small lakes, which lie scattered in the valleys between the chief 

 peaks. Beside Basin Lake he found one which he called the Hamilton 

 Moraine ; another he described as occurring on the northern side 

 of Lake Margaret ; and a third to the north of Mount Tyndall. The 

 ice that formed these moraines Moore estimated as being 1000 feet 

 in thickness. That the deposits were post-Carboniferous in age was 

 proved by his discovery of boulders of Carboniferous rocks in the 

 moraines. 



As Dunn had previously recognized recent glacial action in this 

 district, there seemed no reason to distrust Moore's evidence, in so far 

 as it related to the summit of the higher plateau of Tasmania ; but 

 his arguments in favour of an extension of the former glaciers to a 

 lower level were less convincing. In a note, published at the same 

 time as his paper on Mount Tyndall, Mr. Moore reported the existence 

 of morainic material at low levels in the broad valley of the King, 

 and its tributary the Linda. He stated, for instance, that a moraine 

 connects the eastern flank of Mount Owen to some hills in the King 

 Valley, known as the Thureau Hills. These localities range from 

 900 feet down to only 40U feet above the level of the sea. 



Mr. Moore was emphatic as to the origin of these deposits, and 

 he had excellent sections on which to found his opinion. For he 

 claimed that the material worked at the old King Lyell Mine was 

 glacial. He wrote 



* it will be interesting for the Linda <:old-miiun<r shareholders to know that the 



© op 



deep ground hydranlicallv sluiced on their sections is nothing but a huge mass 

 of rnorainal matter ; many of the large boulders and smaller accumulations of 

 stones of a soft nature are beautifully scored.' 



This evidence would have appeared conclusive, had not Moore's 

 views been opposed by geologists whose opinion carried greater 

 weight. Thus Mr. A. Montgomery," the Government Geologist of 

 Tasmania, in a paper published later in the same volume, treated the 

 occurrence of the Carboniferous fossils of Mount Sedgwick, which 

 Moore regarded as ice-borne erratics, merely as proof 3 



' that the sedimentary strata [the Carboniferous] there too underlie the green- 

 stone-capping ' 



of that mountain. He objects that the fossiliferous conglomerate 

 was not due to the action of floating ice, but 



' that it is a moraine-drift derived from the lower beds of the Carboniferous 

 formation, which, farther north, near Barn Bluff and Cradle Mountain, consist 

 mainly of conglomerates. These would supply the stones of granite, slate, 

 porphyry, etc., which Mr. Moore has noticed, and also the fossils ' 



1 Proc. Eoy. Soc. Tasm. toL iv, 1893 (1894) p. 148. 



2 'Glacial Action in Tasmania' Proc. Roy. Soc. Tasm. vol. iv, 1893 (1894) 

 pp. 159-69. 



3 Ibid. p. 161. 



