164 
A shaft has been sunk to 50 ft. on the south-western end of the 
Iron Mask ” outcrop. Unfortunately, the upper portions of the 
shaft have been destroyed by hush fires, but it would appear from the 
dump that ore of a value equal to that at the outcrop has been obtained 
at the greatest depth reached. It is to he regretted that a shaft has 
not been put down below water level, and cross-cuts extended to prove 
the width and values of the ore bodies. 
The most important geological feature in the hfowa jSTowa and 
Mt. Tara belt is the occurrence of two belts of igneous rocks belong¬ 
ing to the Snowy River porphyry series, and including lavas and intru¬ 
sive rocks. These are approximately parallel, with a strike of N. 
10° E. to N. 20° E. (magnetic), and are Sioparated by a 
belt of Lower Palseozoic sediments about 1 mile in width. The latter 
are, for the most part, considerably indurated. The occurrences 
of iron ore are confined to the porphyry, and it will he noticed by 
reference to the accompanying sketch plan that if a strike coincident 
with the general direction of the outcrop of the porphyry be projected 
from the JSTowa JSTowa outcrops, it will pass in close proximity to the 
outcrops extending to the “ Iron Mask ” lode. In all cases the iron 
is associated either with a silicification of the porphyries or the occur¬ 
rence of siliceous or jaspidean veins in the porphyries. 
The following are the results of samples submitted 
gical Survey laboratory for assay:— 
to the Geolo- 
Iron (Ue) 
Phosphorus 
Sulphur 
JSTo. 1 (334) 
Per cent. 
65.8 
0.013 . 
0.025 . 
J^o. 2 (335) 
Per cent. 
57.0 
0.034 . 
0.074 . 
I7o. 3 (336) 
Per cent. 
43.6 
0.028 
0.109 
The samples were also assayed for gold and silver. I7o. 2 sample 
contained 1 dwt. 7 gr. of silver. 
Ho. 1. From large outcrop south of Mt. jUowa JSTowa. 
JSTo. 2. JSTorth end of “Iron Mask’’ lode, Mt. Tara. 
Ho. 3. South end of “Iron Mask” lode, Mt. Tara. 
[20.4.14.] 
GEOLOGY OF THE HOWA HOWA DISTRICT. 
By W. H. Ferguson, Assistant Field Geologist. 
Boggy Creek flows southwards and enters Lake Tyers a few chaius 
below the Howa Howa bridge. The creek is rockbound for 3 or 4 
miles from the lake; for some distance above the bridge, and below 
