File:The Quarterly journal of the Geological Society of London (12513281054).jpg

276
PROCEEDINGS OF THE GEOLOGICAL SOCIETY. .April 24,
granite rocks that occasionally protrude above its surface, or of
volcanic rocks of black scoria that frequently interrupt the general
level.
"Proceediug inland for the next 50 or 60 miles is a granite
country that has been originally capped with horizontal sandstones,
Fig. 3. — Cliff and Outlier of " Desert Sandstone" at Gave Creek,
Gilbert District, Northern Queensland.
and has an elevation of about 1000 feet; this range terminates to the
southward in level plains of good soil, the produce of the next series
of more elevated country; whilst towards the northern edges the
granite and sandstones have undergone great changes, through the
action of numerous trap-dykes, that have greatly disturbed the sur-
face, producing metamorphic rocks, some resembling jasper, and
others highly cellular and scoriaceous."
In about latitude 22° on the meridian of Nichol Bay he came upon
another and more elevated range trending away to the S.E., having
an altitude of 2500 feet above the sea.
This, unlike the last section, has a sotitheru escarpment of 500 or
600 feet, and an average breadth of 8 or 10 miles ; it consists of
horizontal sandstones and conglomerates, which have undergone com-
paratively little change.
Augustus Gregory's description of the sandstones of the Victoria
river, as illustrated by the accompanying section (Fig. 4), agrees