56 Proceedings of the Royal Society of Victoria. 



miles higher up the Deep Creek high dips are prevalent in areas 

 mapped as " Upper Silurian." 



The alternative is that we have here two distinct series, one of 

 which dips less steeply than the other and rests unconforniably 

 on it (at J an unconformity could be avoided by a faulted 

 junction such as occurs at H). That they are two independent 

 series is more likely, for the relations of the dip and strike of the 

 two series at J and H are very similar and agree well with what 

 would occur on a parallel anticline to that of Keilor, also with a 

 northerly pitch, whereas in irregular minor crumpling in a 

 syncline such correspondence seems unlikely. I have already 

 mentioned that I did not notice glacial evidences at Keilor. The 

 material seemed to have been derived from the same land surface 

 as the other conglomerates, not necessarily under the same 

 conditions. 



I am not aware of any previous notice of glacial conditions 

 in Ordovician time in Australia. An occurrence of probably 

 glacial origin is described by Mr. W. Howchin, F.G.S., in 

 Kangaroo Island,'* wliicli is older than the prevailing glacial series 

 there, but, though its age is uncertain, it does not seem to be 

 referaV)le to quite as early an age as this. 



The series more recently described by him near Adelaide, and 

 already referred to, is regarded as Cambrian on the general weight 

 of the evidence. 



There are a number of Victorian localities at which the 

 existence of glacial rocks has been noticed without much evidence 

 as to the relations to other beds. No doubt the majority of these 

 belong to the Bacchus Marsh series, but the existence of others of 

 this series is also possible. 



s Tran. Roy. Soc. S.A., vol. xxiii., pt. ii., 1899. 



