RELATIONSHIPS OF THE AUSTRALIAN CAINOZOIC SYSTEM. 
faunal relationships are decidedly Janjukian. From Batesford, 
extending up the Moorabool Valley, the polyzoal rock is greatly 
in evidence. This deposit at the base is largely composed of 
Lepidocyclina shells, with abundant granite detritus from the 
adjoining coast. The overlying white polyzoal limestone with 
Amphistegina replacing to a large extent the Lepidocyclina 
indicates fairly deep water conditions, and a general freedom 
from terrigenous material. During this phase, therefore, the 
Janjukian sea probably represented a fjord-like aspect in which 
an arm of the sea extended up a drowned valley. In the 
neighbourhood of Steiglitz there are certain fault-lines which run in 
a parallel direction with the general trend of the axis of outcrop of 
the polyzoal rock, and these may have been developed as a small rift- 
valley cutting into the Ordovician ranges of the country beyonj 
Maude and Steiglitz. That the conditions were not stable for a long 
F»’^. 11. Section in the. a&ool valley new iAwoe.. 
period is seen in the presence of argillaceous beds between the poly- 
zoal rock as at Torquay, and above the same at Waurn Ponds and 
Batesford. 
[ 40 ] 
