ON THE WAIANAMATTA SHALES. a. 
Incorrectness of these views.—Having carefully visited the locali- 
ties in which the Waianamatta formation is said to exist, I have 
come to quite different conclusions from the late Messrs. Clarke and 
ukes, and it is with the greatest respect for both these eminent 
and veteran geologists that I record my opinions in opposition to 
theirs. But it is only lately that facilities have been accessible to 
geologists to enable them to examine the true nature of these 
The cuttings and tunnels in connection with the new 
waterworks have afforded great advantages for the inspection of 
the strata. I do not think that either of the two gentlemen 
referred to would have written as they did concerning the Wiana- 
matta had they examined the ground with the aid of the recent 
excavations. e i 
mere seams of gs fr the Hawkesbury sandstone, whic 
occupy quite different levels in that formation; (3) that th 
do not oce asin in the formerly eroded rocks 
tely. 
1. Shales not lying on the top of Hawkesbury sandstone.—The 
of the Hawkesbury rocks are quite destitute 
. to irregularly banded grits and shales of much 
Waigt, dimensions. ‘These differ in no way from the so-called 
in the matta at Campbelltown and the neighbouring valley. Even 
no 1S valley much of the highest portions of the sandstone have 
a upon them. In eve lly or watercourse the sandstone 
seen i ~ finally sandstone without any shale upon co can oe 
) ve 200 up to 
1,000 feet © valley " the Nepean at every level from p 
os Waianamatta shale intercalated with the Hawkesbury 
-—The evidence of this is very visible from the various 
