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Geology of Sydney. 
CHAPTER VII — ( Continued). 
THE FOSSIL PLANTS. 
THE HAWKESBURY-WIANAMATTA SERIES — THE FOSSIL 
PLANTS — CHARACTER OF THE TRIASSIC FLORA — FOSSIL 
PLANTS DESCRIBED — CLASSIFICATION OF FOSSIL PLANTS — 
THE SANDSTONES AND SHALES BELONG TO THE SAME 
GEOLOGICAL PERIOD — THE NARRABEEN SHALES j THEIR 
ORIGIN AND DISTRIBUTION. 
Returning now to the fossil plants, we find that the 
rocks supply us with evidence detailed enough to 
picture to ourselves the trees and plants that clothed 
this part of the world in Triassic times. The difference 
between the vegetation of the South of England and 
Australia is as wide as it well could be. Excepting 
plants introduced by man, it can be safely said that 
there is not one tree, and very few species of smaller 
plants, common to England and Australia. The 
difference could hardly be greater. It may be safely 
said that the difference between the flora of to-day 
and the flora that flourished while our sandstones 
were being deposited in a shallow sea is just as great. 
The abundance of plant impressions in the shales, and, 
indeed, the carbonaceous character of the shales them- 
