162 
80 ft., if necessary. Should the work he successful in locating the 
reef, the prospects of it carrying payable stone are good, as the stone 
stoped on ISTo. 3 fault was worth an ounce to the ton, and the reef, if 
located, may reasonably be expected to carry stone of similar value. 
[20.4.15.] 
lEOhT OEE AT E'OWA NOWA AISTD MT. TAEA. 
By 0. A. L. Whitelaiv, Field Geologist. 
In 1908 an inspection was made of the country surrounding ISTowa 
Nowa and Mt. Tara, and the beds of that locality were searched for 
evidence to determine their age. In 1905, Mr. E. J. Dunn^ submitted 
a report on the area, in which he stated that he considered the age of 
some of the beds were probably Heathcotian, and therefore among the 
oldest rocks occurring in Victoria. While it is possible that the cherty 
rocks, which lithologically resemble those of Heathcote, may be contem¬ 
poraneous, there is no direct evidence that they are so. Palseontological 
evidence obtained by myself, and supplemented at a later period by Mr. 
W. H. Eerguson, definitely determines the age of the main series of 
sedimentary rocks abutting on the Snowy Eiver porphyries as Upper 
Ordovician, a collection of graptolites obtained 5 miles 50 chains from 
JSTowa Uowa, on the road cut by the Mines Department from Uowa 
Uowa to Buchan, containing the following:— 
Didymograptus of. caduceus, Salter. 
Dichograptid fragments. 
Dicranograptid fragments. 
Diplograptus angustifolius, J. Hall. 
Diplograptus, sp. 
Diplograptids. 
Climacograptus, sp. 
Glossograptus hermani. T. S. Hall. 
Glossograptus, sp. 
Dr. T. S. Hall,^ who identified these, states that their age is Upper 
Ordovician, although the exact horizon is uncertain; they are, however, 
lower than the Wellington Eiver series and those of the Jordan-Thom- 
son Eiver. He considers that the relative abundance of Glossograptus 
is remarkable. 
The most important outcrop of iron ore in this district is on the south¬ 
western slope of Mt. JSTowa JN^owa. (Eig. 56.) Ho thing has been done in 
the way of development to show the dimensions of the ore occurrence 
except a small cut near the south-western end of the outcrop, where a solid 
body of ore of good quality some 8 ft. in thickness is exposed. Associated 
with this is siliceous and jaspidean material intersected with small 
veins and inclusions of iron oxide. The high-grade iron ore appears 
to occur in lenticles or shoots, the dimensions of which may only be 
satisfactorily determined by proper prospecting methods. The country 
is well adapted for tunnelling, and if a cross-cut tunnel were put in 
to intersect the ore channel at about 100 ft. or 150 ft. below the outcrop, 
^ E. J. Dunn, “The Iron Mask Ferro-Manganese Mine, near Buchan, East Gippsland,’’ Bee. Geog« 
Surv. Viet., Vol. II., Pt. 1, p. 49. 
* T S. HaU, Beports on Graptolites, Bee. Geol. Surv. Viet., Vol. Ill, Pt. 2 p. 209. 
