170 
On the geological sketch plan I have indicated the main formations 
near the river, showing approximately the trend of the chert and jasper 
beds. In these the phosphatic rock, with wavellite veins probablv 
occurs, as at Tatong. The specimens analyzed were probably found 
between the Howqua River and the heads of the Lick Hole Creek. 
The second sketch plan shows the chert and jasper areas near Tatong, 
Mansfield, and near Mount Buller. The latter beds are very much like 
those at Tatong. 
The chert inclusions in the amphibolites, and the main chert formation 
are exactly similar in character, and must have had their chertv texture 
before the intrusion of the amphibolites. 
The Silurian beds are only a little altered, and quite distinct from 
the cherts and jasper beds, which helps to bear out my report on the 
Tatong cherts and jaspers. 
On my trip to the Great Rand Mine, and back to Mansfield, I noted 
roughly several formations which are not indicated on the Geological Map 
of Victoria. (See Plate XXXIV.) 
1. Outcrops of the Mansfield sandstones and chocolate mudstones 
(Carboniferous) occur to the south of the Howqua River. 
2. Amphibolites occur to the east of the Lick Hole Creek also, and 
with serpentine at the Great Rand, and around the new 
chert area. 
3. Amphibolites occur all along the track east of Stockyard 
Creek up to near Mount Warrambat (Timber Top) 
[Report sent in P-5-C5-] 
THE EDI TURQUOISE FIELD, KING RIVER. 
By E. J. Dunn, F.G.S., Director, Geological Survey. 
All the turquoise-bearing outcrops in the neighbourhood of Edi have 
been met with in the belt of country lying between the Black Range and 
Sheepstation Creek. This tract is hilly to mountainous, well watered, and 
from 1,200 to over 2,000 feet above sea-level. 
The whole area consists of sandstones and slates apparently of Ordo¬ 
vician age, but no fossils were detected by which this point could be settled. 
The beds are highly inclined and evidently folded over axial lines, for on 
crossing this strike, they are found dipping alternately in opposite direc¬ 
tions. The strike of these beds appears to be very regular at about 35 deg. 
to 37 deg. W. of X. The slates and sandstones in places bear ample 
testimony to the severe stresses they have been subjected to; the slates are 
often “ creased 55 in a remarkable manner. 
Since my first visit extensive mining operations in search of turquoise 
have been carried on at several localities. The most southerly locality is 
marked No. 1 on the accompanying plan. The.ground is held by Messrs. 
Newman, Gascoigne, and others as a Mineral Lease (No. 928). , The work¬ 
ings are on the crest of a ridge just within the north-west end of the lease. 
Elevation above sea-level, 1,800 feet. 
For a width of 3 chains the slate belt carries turquoise veins and an 
open-face cutting has been carried in across nearly this width and to a 
depth on the working face of from 30 feet to 50 feet. The southern end 
of these workings is the latter depth from the floor to the surface on top of 
the ridge. From this floor a shaft has been sunk to a depth of 45 feet- 
