ON THE WAIANAMATTA SHALES. 81 
still a slope, and not a basin. Campbelltown is 209 feet above 
the sea at the railway station. There is a rise of sandstone and 
shale between it and the valley of the Nepean, which is only 80 
feet below this rise, and it is 150 feet above Campbelltown. From 
this there is a much more rapid rise towards the main range. The 
lowest part of the so-called basin is the valley of the Nepean, and 
this, we have seen, is 150 feet higher than the entrance of the 
valley, to which it descends in a series of terraces, instead of being 
itself a basin. 
We find the same thing in crossing the so-called basin, where it 
is marked in the map of Mr. Clarke. From Parramatta to Black- 
town there is a rise of about 100 feet. From this to the valley of 
of the subject will be referred to again. 
If 1 entologically the shales one with the Hawkesbury rocks.— 
e Waianamatta is to be considered as a separate formation, it 
must be on account of its clearly lying above the Hawkesbury, 
and having a distinct fauna of its own. Neither of these positions 
can be sustained. i 
that w 
much richer in fossils than the sandstone, but they are not usually 
: . 
