50 Proceedings of the Royal Society of Victoria. 



covery of three species of Gangamopteiis, Professor McCoy 

 assigned tliem to Triassic times. Last year, more fossils 

 were obtained. These were somewhat fragmentary, but 

 Sir Frederick McCoy thinks he can identify Schizoneura 

 and Zeugopliyllites, indicating a lower Triassic age for the 

 rocks in question. 



After the glacial material had been deposited in this 

 ancient valle}', it was overflowed by basaltic lavas of 

 Pliocene age. Whether the older basalt of Miocene times 

 also overflowed this valley ])reviously to the foi-mer, we 

 cannot say with certainty. We have seen no evidence 

 of it at any rate. Since Pliocene times the valley has 

 been again denuded to its present condition. 



From the general characters presented by the so-called 

 glacial conglomerates, we were much inclined to the opinion 

 that they would turn out to be, not an iceberg-drift, but 

 in reality till, or boulder-clay— in fact the ground moraine 

 of ancient glaciers. These characters may be summed up 

 as follows: — (I) The unstratifled nature of the clayey 

 matrix. (2) The number and variety of the included stones. 

 (3) The striated and glaciated aspect of many of these 

 stones, (4) Their total want of arrangement. In fact, 

 these deposits bear such a striking resemblance in every 

 wa}' to the till of Scotland and elsewhere in the Northern 

 Hemisphei-e, that it can haixlly be doubted that they are of 

 similar origin. Corroboration was therefore to be sought 

 for in the shape of roches moutonnees, or shattered rock 

 surfaces beneath this deposit.* 



In the valley of the Myrniong Creek, opposite the section 

 described as occuri'ing on the south side, can be seen rounded, 

 hummocky-looking masses of sandstone, the appearance of 

 which is very suggestive of glacier action. It is very 

 probable that the glacial conglomerate not long since covered 

 these rocks, and thus protected them during a long period 

 from the effects of weathering. It must also be ren)embered 

 that the glacial conglomerate itself must have been piotec- 

 ted for a considerable time by the basalt. The sandstone is 

 hard and massive, and is just the kind of rock on which the 

 abrading and rounding effect of glacier ice would be well 

 represented. Certainly, stride and grooves are absent, but 



* Having had opportunities of observing the till and other phenomena of 

 glaciation in Scotland, Ireland, and Switzerland, I can vouch for the striking 

 resemblance of our glacial deposits to the boulder-clay of the Northern 

 Hemisphere. — Graham Officer. 



