5 
are important, flow nearly north and south along the valleys 
between outliers of the Main Range. Mount Thomas is a very 
important mountain of granite near Port Douglas ; and Mount 
Peter Botte, 3,500 ft., is another granitic peak about 40 miles 
inland from Cape Tribulation which separates Trinity from 
Weary Bay. Mount Cook (1,400 ft.), at the mouth of the 
Endeavour, is another granite peak with many hills of the same 
kind of rock and lower elevation in the neighbourhood. Here 
and there cliffs of stratified rock may be noticed on the coast, 
and as far as I could discern at a distance the formation was 
closely similar to the paleozoic rocks of Victoria and Hew 
South Wales, the strata being inclined at high angles. At 
Island Point, Trinity Bay, the rock formation exposed was a 
paleozoic metamorphic rock, the strata still traceable and very 
highly inclined. Here and there a dark substance very like 
dolerite can be seen in the mass, but not confined to any parti- 
cular stratum. It would be hard to give it a name from its ex- 
ternal appearance, but I attributed it to partial metamorphism. 
There was no granite in the immediate neighbourhood. 
About ten miles further north the Daintree River finds an 
outlet to the sea. I ascended this river as far as it is navigable, 
but was not able to find any rock sections except in one or two 
places. These were clay slates almost vertical. At a cascade 
about 20 miles from the mouth of the river the water falls over 
a rock like diabase. 
In making a journey inland from Island Point as far as the 
Hodgkinson River, I found the rock formation to be highly 
inclined slates, schists, and sandstones, with quartz veins, until a 
granitic axis is reached, at about thirty-five miles from the sea. 
After this range has been passed over, lower paleozoic rocks 
succeed, with quartz veins and trap-dykes, in which the Hodg- 
kinson River Diggings occur. I have dealt separately with the 
geology of the Hodgkinson Gold Field,* and shall return again 
to the consideration of the geology of the interior. 
After passing Mount Cook at the mouth of the Endeavour 
River a notable change takes place in the geology of the coast- 
line. The Endeavour River basin itself is an immense amphi- 
theatre formed by the recession of the coast range in a large 
semi-circular curve inland. The range returns to the coast at a 
point called Indiau Head,f of which an outline sketch is hero 
given (see outline sketch Ho. 1). The granite has now disap- 
peared, and instead we have paleozoic rocks highly inclined, 
curved, and folded in a series of anticlinal and synclinal folds, 
on the top of which rest strata of almost horizontal ferruginous 
sandstone, in appearance very like the Hawkesbury sandstones 
of Port Jackson. The hills on the coast range and in all the 
country back towards the head of the Endeavour River are of 
unequal height, showing in every part long-continued subaerial 
* See Transactions of Royal Society of Victoria for 1880. 
f A name badly selected, as there is already a point named Indian Head 
on Frazer’s Island, near Brisbane. 
