BY W. F. PETTERD. 39 
west bank of the Tamar extensive deposits exist which 
have been economically worked; Circular Head ; 
Blue Tier; Mount Heemskirk; King River; Pieman 
River; Flinders Island; Arthur River; Dial Range 
and Mount Lyell; many other places. 
3. Micaceous. 
Of minute scaly structure. Whyte River, in quartz; 
Mount Reid; Macquarie Harbour; Pieman River; 
Dundas; Mount Heemskirk; Mount Lyell, where it 
is in part highly auriferous. At this locality a variety 
occurs in minute crystals, forming a black powder 
which is reported to be also auriferous: assays have 
been made up to 15 ozs. of gold per ton of material. 
4. Reddle.—Red ochre or earthy oxide. 
This variety commonly occurs with the other forms from 
which it is disintegrated; it is often impure by admixture 
with earthy matter. Occurs in considerable abundance 
at many places on the West Tamar and along the north- 
west portion of the island; Flinders Island; Mount 
Lyell, where it is often intimately mixed with powdery 
Baryte, in which state it has been termed “ Volcanic 
Mud;” and Crocus; at this locality it often contains 
free gold. 
It has been stated (“Tasmania and its Mineral Resources, 
1888”), that “early in the century Lieut.-Governor Collins 
forwarded a quantity of the ore to England, but without practical 
results, though Mr. Commissioner Bigge subsequently stated in 
his report on the trade and agriculture of New South Wales (of 
which this colony was then a dependency), that analysis made in 
England passed it ‘ to consist of pure protoxide of iron, similar to 
the black ore of Sweden, and furnishing a very pure and malleable 
metal.” Surveyor-General Evans states (“A Geographical, 
Historical, and Topographical description of Van Diemen’s Land, 
1822’), “Within a few miles of Launceston there is a most 
surprising abundance of iron. Literally speaking, there are entire 
mountains of the ore, which is so remarkably rich that it has been 
found to yield seventy per cent. of pure metal.” 
111. HUASCOLITE (Sulphide of Lead and Zinc). 
Occurs in large to small blocks and masses in the workings of 
the Godkin Extended mine, Whyte River. The ore occurs loosely 
imbedded in a friable granular sandstone and pug, the latter 
apparently resulting from the decomposition of primary sulphide 
minerals. In the loosely aggregated rock, and more rarely in the 
mineral itself, indistinct fossil shell casts occur, so that it is 
reasonable to infer that this mineral may be a secondary deposition 
of marine origin, formed from a sediment charged with mineral 
