28 
The Queensland Naturalist 
July, 1929 
show some of the higher summits of the D 'Aguilar Range. 
From Peachester south to Mt. Mee we see the low divide 
(having a steep fall on its eastern side), which separates 
the Stanley waters from the various creeks running east- 
wards directly into the sea. Situated right on this divide 
is the largest and westernmost of the Glass Houses, Mt. 
Beerwah, 
The Stanley River, rising in the southern slopes and 
foothills of the Blaekall Range, runs about E.S.E. to 
Peachester, as if making for the sea by the shortest and 
most convenient route. At Peachester, however, when 
less than a mile from the low divide (of soft sandstones), 
separating it from the lower coast country, the stream 
suddenly makes a hairpin bend and turns right away 
from the coast, proceeding via Woodford and Kilcoy to 
join the Upper Brisbane in a journey of some 180 miles 
to the sea instead of the ten or fifteen miles had it con- 
tinued in the original direction. Much of the present 
long course is through hard rocks, and the sides of the 
gorge which it has cut through Mt. Brisbane are of 
greater elevation than the low saddle of soft rock which 
the Stanley appears to avoid at Peachester. 
A sudden change in the direction of a stream is a 
feature beloved of physiographers, as showing a capture 
by one stream of the headwaters of another, diverting 
the latter into a new direction. Such an explanation in 
the present case is untenable, for it would be impossible 
for a stream with 180 miles to travel to the sea largely 
over hard rocks to cut down its bed more quickly than, 
and to capture the headwaters of another stream with 
only 15 miles to travel over very soft and easily eroded 
rocks. 
On top of the Blaekall Range immediately to the 
north, Obi Obi Greek takes a similar course to join the 
Mary River, and a study of it may yield a clue to the 
anomalous course of the Stanley, which must have been 
developed when the country was at a higher level than 
Little Mount Brisbane, which forms the lower side of 
the gorge. 
Basalt forms the top of the Blaekall Range. The 
very top of Candle Mountain is also basalt, probably a 
small remnant of the same lava flow. Except for this 
small capping, Candle Mountain is composed of sandstone, 
as, is the country eastward to Ca-loundra. Near the basalt 
cap a few waterworn pebbles of trachyte are included in 
