No definite indication of tlie age dur¬ 
ing which these faults occurred can be 
•derived from the locality under review, 
but the Sehouten Island one is certainly 
post-doleritie, and much e osion has 
proceeded since it occurred. Early 
Tertiary would approximate to the date. 
The Cape Hornier fault, in common with 
faults governing the coast of Tasman's 
Peninsula, have a more recent appear¬ 
ance, and are probably about early 
Pleistocene. 
The coal measures which outcrop 
round the north-western and western 
shore of the island proved of interest 
Three old shafts can be. seen close to 
the beach. (hie right m f be beach 
just west of Mr. Fergusson's house, and 
the second about a quarter of a mile 
further west, just between two diabase 
outcrops on the beach and a little east 
of the sand dunes on the north-west, 
corner of the island. From this latter 
and past the former a tram line was 
constructed with, obviously, the expen¬ 
diture of much labour, to a jetty, now 
vanished withciit a trace on the west 
side of the cove, where we were camped. 
The third shaft is situated a'“out 100 
yards up the largest creek on the north¬ 
west of the island, and about a quarter 
of a mile ■west of the sand dunes. It 
was sunk by Bernaeehi about 1920, and 
the timbering i s still in good order. 
Water rises in it to within six feet of 
the surface, and 50 feet above the sea 
level, 100 yards away. 
Recent earth movements round this 
side of the island are apparent. The 
creeks flowing in broad valleys have 
commenced to cut narrow gulches in the 
soft coal measures of these valleys. 
Obviously the cliffs here are of recent 
development, and the evidence would be 
equally consistent with a recent or 
Pleistocene faulting in Pleurier Bay, re¬ 
juvenating the streams by increasing 
ihe slope, or with an uplift of some 100 
feet. Probably the former is the more 
correct interpretation. 
Tin is found in these East Coast 
granites scattered through the rock in 
tiny crystals. This has led many an 
optimist to waste time and trouble ex¬ 
cavating in the solid granite. Some 
trenches dug for this purpose exist near 
the top of Flagstaff Hill, the highest 
point on the island. Hut it may be 
stated as a general proposition, subject 
only to very rare exceptions, that valu¬ 
able ores, if they occur at all in these 
granites, are so diffused that they can¬ 
not be recovered unless conoentrated 
This concentration can only take place 
by the metal being carried in solution 
during the intrusion and deposited in 
some trap, in which case it would be 
found in veins in overlying slates or 
schists, and not in granite, or being 
washed out by streams and deposited in 
the stream bed. As the tin is heavier 
than the other component minerals , f 
the granite, it would be dropped early, 
and may thus he concentrated in suffi¬ 
cient quantities to he worked commer¬ 
cially. Certainly the top of a granite 
mountain, although not an impossible 
place, is a most unlikely spot for a 
mineral discovery. 
These rocks arc spoken o* as granite. 
Opportunity has not yet presented itself 
of examining them microscopically, and 
until it does this nomenclature must be 
tentative. Time did not admit making 
a study of the internal structure ot 
the great batholith. This must lie work 
for a future expedition, and should 
provide most interesting rwu'ts. 
15 
