86 THE HAWKESBURY SANDSTONE. 
gro , 
formed partly by the drainage from glaciers, and partly of trans 
ported blocks of large size and various kinds of rocks. Boulder 
clay is stratified, but the stratification is often thrown into laye 
folds and wrinkles, and ploughed up as it were on a giganti¢e seale 
by the former stranding of icebergs. 
so are the included fragments. We have no such thing 8 ive 
and since I differ from him in the interpretation of these an 
I should like also to record here my high sense of the servit® 
has rendered to geological science in New South Wales, the realy 
help he has given to me in these inquiries as well as on all ot 
occasions, 
But another difficulty is, that these glaciers must havé ee 
from an enormously high land to produce them on 80 eee 
scale. We have no evidence that there has ever been 8" 
mountain range. If there had been, it must have dis# ob 
under a great and rapid subsidence. Yet it is upheav - ¢ 
sidence, which we want, to account for the presence ya 
sandstone 3,000 feet and more above the sea. There 18 Ee 
m all geology for the appearance and disappearance of 4 thin 
ranges in this manner. Moreover, we find this deposit ie such 
the tropics, and where is the glacial system that would incluae 
climatic changes? Finally, ice action is certainly unfa yet 
to the formation of coal and the luxuriant growth of gor 8 
are the common remains in the sandstone. But) ay 
do not think it is necessary to pursue this part of the subject Je 
slow acount 
io ve have 
— “ aerial deposits since their upheaval from the se fis : 
would rank them as Permian, while the most extreme OP gf 
the other side would not rank them as newer than the: hic 
