96 
Geology of Sydney. 
Tertiary. 
We have no notable developments of Eocene* Mio- 
cene* or Pliocene rocks witliin the area we are dealing 
with* and beds of marine origin belonging to either of 
these periods are not known. This absence of marine 
beds of Tertiary age is remarkable* as there is a great 
development of marine Tertiary deposits in Victoria* 
South Australia* and Tasmania. The country around 
the Great Australian Bight* and for one hundred and 
Fig. 25 . — Myriolepis Clarkei 1 , Egerton. A dorsal fin reduced. 
fifty miles inland* consists of marine formations of 
Tertiary age. The absence of any similar beds on the 
New South Wales coast points to the fact that our 
coastal district stood above the sea as dry land during 
the vast length of time that the marine deposits 
referred to were accumulating. 
The material at our disposal justifies us in pictur- 
ing this portion of New South Wales as dry land* 
while the Tertiaries of South Australia* Victoria* and 
1 Woodward’s Fossil Fish of the Hawkesbury Series at Gosford, Plate ii. 
