Art. VI. — Glaciation of the Western Highlands, Tasnimiia. 

 (Witli Plate VIII.) 

 By E. J. Dunn. 



[Eead 8th June, 1893.] 



During the mouth of October, 1892, professional work took 

 me to the high rugged region surrounding Lake Dora, and there 

 I had the satisfaction of discovering glaciation in its various 

 developments and on an extensive scale. The salient features 

 were made known at the time through the press, but as further 

 particulars may be acceptable, a sketch plan has been drawn of 

 the locality, and further data are appended. 



Position, etc. 



Lake Dora lies in a direct line about clue east from the town- 

 ship of Zeehan and twelve miles distant, but the track between 

 the two points is quite twenty-five miles long, and very difficult 

 to traverse. Lake Dora is about 2,500 feet above sea level. The 

 high tract of country over which glaciation occurs is shown on 

 the plan on the smaller scale, the area more carefully examined 

 is shown on the larger scale plan. 



Geology. 



This region is occupied by two principal rock formations, the 

 older or schistose series is usually highly inclined, consisting of 

 arenaceous, argillaceous and conglomerate schists; the schists are 

 covered unconformably by massive sandstones, quartzites, cherty 

 andquartzose conglomerates, belonging, apparently, to theDevonian 

 age and corresponding to the Devonian conglomerates of Victoria. 

 ]Most of the hills and ridges on the highlands are of the Devonian 

 series, the schists occupying the hollows and valleys. The schist 

 appears to be more readily worn down than the Devonian beds, 

 hence most of the tarns appear to be on the former rock, or 

 rather scooped out of it. 



