8 
eastern side of the table land, the upturned edges of the slate 
seemed like a dolerite, and I should think newer than Silurian, 
because of its resemblance to upper paleozoic rocks in other 
parts of the colony. But my conclusions on this subject were 
formed from a very slight observation. 
In connection with the slates, dykes, and quartz veins of 
the Hodgkinson Gold Eield there was a considerable outcrop of 
black limestone, besides very thick veins of quartz which 
include no gold. Some of the hills also were of strata consist- 
ing largely of jasper and chalcedony ; the strike of all the 
quartz veins is east and west, but the strike of the slates is a 
point east and west of north-east and south-west, so that the 
slates abut diagonally on the faces of the reefs. The dykes 
correspond in strike with the strata, and as they are more recent 
they continually cut off the veins and fault them. The course 
of the ranges about the diggings is the same as the strata, and 
this is very nearly diagonally to the main divide. Prom the 
direction of the streams we can gather that this is generally the 
course of the spurs which flank the granitic axis. 
There can be no doubt that the granite is the transmuted 
lower paleozoic strata. This can be seen as the road crosses the 
axis. Slates gradually pass into schists and so on into gneiss 
and finally granite. In saying that these rocks are Silurian, I 
only do so from the fact that they are very similar in character 
to the lower Silurian auriferous rocks in Victoria, which are 
known to be so from the included fossils. Those of the Hodg- 
kinson may be either older or younger. 
We can conclude nothing as to the extent of the beds 
transmuted into granite from the thickness of the granitic axis, 
because it is most probable that these upturned strata represent 
a series of folds whose curves have been denuded away. Some- 
times in the midst of the granite little patches of unaltered, or 
very slightly altered, slate may be seen. They have generally 
the same dip and inclination as the other parts, as well as the 
gneiss and schist, from which we may conclude that the slates 
were upturned to their present angle, or, rather, that the 
folding of the strata was effected before the metamorphism into 
granite. 
In the midst of these ranges we find an isolated patch 
of the Dalrymple sandstone, lying unconformably upon the 
summit of the slates just as before described at the mouth of 
the Endeavour Biver. This is Mount Mulligan, an isolated 
range of about twelve miles in length and very conspicuous 
amongst the neighbouring hills for its flat-topped summit and 
precipitous outline. The lower part of the mountain, as it 
consists of slates and quartz reefs, is worked for gold, and there 
are mines on several different portions of it. There cannot be 
much doubt that all the ranges hereabouts were at one time 
covered by this deposit, which probably stretched over the whole 
peninsula ; but it has all been denuded away, leaving only a 
few outliers on the summits of the ranges. The section ot 
