9 
Dalrymple sandstones on Mount Mulligan is a more extensive 
one than on any other mountain in the north of Queensland. 
The appearance is exactly that of the sandstone on the Blue 
Mountains or at Port Jackson. It is a fine-grained freestone, 
with many ferruginous concretions and red bands. It is full of 
strata of the nature known as false bedding. I am not aware 
that fossils have been found in it, but I am assured that the 
quartz veins never penetrate it, nor is it known to have any 
volcanic dykes. 
I return now to the Endeavour Itiver, from the mouth of 
which I made an excursion inland. The line followed by me is 
about 100 miles north of Mount Mulligan. The town of Cook- 
a town is built entirely on the grey and pink granite of Grassy 
Hill, except the small portion already mentioned, which is 
occupied by a doleritic dyke. About two miles out of the town 
the granite ceases, and there are many outcrops of vertical 
slates and schists with quartz veins. As well as I could ascer- 
tain, this formation continues for a considerable distance inland, 
say 14 or 15 miles, but of this I can hardly be sure. The 
ground is level and extensively covered with an alluvial deposit. 
There are very many creeks or small rivers, but though they 
have not deep channels I saw nothing but alluvial deposits on 
the banks. The first mountain range crossed was about 1,000 
feet above the sea. The rock was somewhat similar to the 
\ slates on the lower ground, but belongs to a different formation. 
It is a highly-inclined quartzose sandstone, the beds dipping 
at various angles, sometimes quite vertical, and sometimes 
curved and contorted. I have been informed by Mr. Jack 
that plant impressions are found on these rocks, and that they 
are quite similar to the coal-bearing deposits to be mentioned 
presently. 
After passing this range — called, I believe, the Annie 
Laurie — another range is crossed at about 1,400 feet, evidently 
of the same character. This is, I believe, known as the 
Grecian Bend. The hills after this become extremely steep, 
and the country of a very broken character. The ground 
becomes covered with a peculiar gravel of rounded quartz 
v ranging in size from a mere pebble to that of a man’s head. I 
turned northwards from the road into the ranges for the 
purpose of examining a prospecting shaft which was being 
sunk in the neighbourhood for coal. Our course was along a 
creek, the banks of which were formed of the pebbles already 
mentioned, together with a conglomerate of other rocks, water- 
worn, and so much changed by the action of aqueous decom- 
position that it would be hard to say what was the original 
character of the strata from which they were derived. The 
creek soon became too much hemmed iu by the hills for riding 
or driving, so we crossed a very steep slippery range on foot. 
I cannot describe the way in which the hill was thickly strewn 
with rounded pebbles of quartz. It was literally white with 
them, We reached the creek at another portion of its course, 
