19 
CONCLUDING Remar 
In the observations now detailed a very large area has been 
added to the known extent of the extinct glacial field of 
ot only be 
ried across Gulf St. Vincent, but it is clear that out 
the whole of the southern portion of Yorke's Peninsula, mea- 
suring, roughly, forty miles by twenty miles, has been at 
one time under glacial conditions. This co nclusion has been 
forced upon me from the widely distributed proofs of ice 
action on the northern = southern coasts as well as through- 
out the inland districts. With the BERETA of a few out- 
r important euis line has been supplied by these 
aci E 
tion inferior to the r Tert ere is, moreover, 
clear proof of stratigraphical unconformability i in the eroded* 
surface of the glacial clay on which the marine beds of the 
be newer than a Cretaceous or Cretaceo-Eocen 
The discovery of glacial clay inferior to the ee beds at 
Troubridge Hill and Point Turton will contribute to the 
correlation of beds of a bari character in other parts of the 
colony. On the north side of the mouth of the Onka- 
rney Point, where the metamorphie rocks rise above sea level, 
i is a thin layer of Eocene limestone in a limited patch resting upon 
the primary lacial clay is absent. At this elevation it may 
have been originally a thin deposit, and Legs Bar easily denuded before the 
bedrock sunk below Ae level of the Eocen 
