598 
much higher yield than this, and there is no comparison between the extent of the 
auriferous areas of Victoria and those of the Russell. The Wardens have been unable 
to form any estimate of the alluvial gold from this field. 
Gold and stream tin ore are found in the beds and alluvial flats of the Lower 
Russell and the Johnstone. No reefs of any importance have yet been worked in the 
district, and it is probable that the alluvial gold has been mainly derived from the 
denudation of the drifts beneath the basalt. There is, however, a rumour of a rich 
reef having been lately discovered. 
MUL6EAVE GOLD FIELD. 
For remarks on alluvial workings, see Chapter XIII. 
MOUNT MORGAN GOLD MINE. 
This mine, which has already (up to 31st December, 1891) produced 907,697 
ounces of gold, is not only one of the richest in the world, but presents geological features 
of unusual interest. It lies about twenty-six miles south-south-west of Rockhampton. 
In the immediate neighbourhood of the mountain, the country-rock consists 
mainly of bluish-grey quartzite — a fine-grained siliceous sandstone, now more or less 
porcellanised full of minute crystals of iron pyrites and specks of magnetic iron ore; 
greywackes of the ordinary type— hard fine-grained sandstones of mingled siliceous 
and felspathic materials, now somewhat indurated; and, lastly, occasional masses of 
pyntous shale, hardened to a flinty consistency, and a few belts of serpentine. These 
sedimentary rocks have been shown, from a large collection of fossils made by the late 
Mr. James Smith, to belong to the Gympie Formation. In the immediate neighbour- 
hood of the Mount the sedimentary rocks appear to have been in thick beds, and they 
have suffered a considerable amount of metamorphism, so that their dip and strike are 
not easily ascertainable. The stratified rocks are, moreover, interrupted and inter- 
sected in every direction by dykes and other intrusive masses of hornblendic granite 
and porphyritic dolcrite,* the intrusive masses occupying nearly as much space as the 
remnant of the original stratified formation itself. The country-rock within a short 
distance of the Mount is traversed by reefs of the ordinary description, such as, for 
instance, the Golden Spur Reefs, the Crow’s Nest Reef, and the Mundic Reef, afi of 
which contain a pretty fair amount of gold. 
The Mount is about 1,200 feet above the sea-level, or about 500 feet above the 
level of the Dee River, which flows past its eastern foot. The “mine” presents the 
appearance of a series of step-like quarries at different levels. The actual summit of 
the mountain has now been bodily quarried away to a depth of thirty-five feet, the 
level of the Second Floor. f Numbers 3 and 4 Floors are respectively thirty-five and 
seventy feet below the level of No. 2; and No. 5 Floor is thirty-five feet below No. 4. 
What is called the Crown Shaft or Main Pass is sunk from the second Floor to a depth 
of 155 feet, beneath No. 5 Floor. No. 2 Tunnel is driven right across the hill from 
north to south at the level of No. 5 Floor. No. 1 Tunnel, a little more to the west of 
north and east of south, is driven across the whole of the auriferous area one hundred 
and fifty-five feet below the level of No. 2 Tunnel, while the Freehold Tunnel is driven 
from east to west thirty-three feet above No. 1 Tunnel. The Sunbeam Tunnel is carried 
Collection of Rooks and Minerals from Mount Morgan, collected by Mr. C. S. 
Willanson, F.G.S., &o. ; by T. W. Edgeworth David, B.A., and William Anderson, Geological Surveyors. 
With an introduction by C. S. Wilkinson, Geological Surveyor in Charge. Records of the Geological 
Survey of New South Wales, ii., p. 85. Sydney ; by Authority : 1891. 
t Now (June, 1892) mainly to the level of No. 4 Floor. 
