ilities for future output. The
Mack slates all show more or
less sulphide mineralization and
should be prospected for pos
sible gold-bearing lodes. Both
the thin bedded and massive
limestone members of this for
mation contains deposits of
marble, some of which have
been quarried.
“In the Wrangell district, the
oelt of the Middle Devonian
rocks that extends across Woe
wodsky Island and along Dun
can Canal, on Kupreanof Is
land, northwest to Frederick
Sound, contains gold and cop
per deposits, also limestone in
beds of sufficient size to afford
a supply of this material if de
sired.”
The regularity or the irreg
ularity of vein fissures depends
in a measure upon the kind of
recks in which they are found
In every quartz region are fis
urc systems, some of which are
regular and others in the im
mediate locality are not. The
mechanical accidents which op
erate in production of fissures
are by this time understood or
should be, by even the prospect
ive prospector. The primarily
underlying igneous rocks being
thrust up through the stratified
sheets above, is a prolific source
of the segregated condition of
the earth’s crust. The prospect
or must soon rea.lize that im
portant relations exist between
dikes and other bodies of elevat
ed igneous rocks and ore depos
its, even in the absence of other
information on the subject than
that acquired by practical ex
perience.
rne above paragrapn may
lead the prospector to a clearer
understanding of the formation
on Kupreanof Island. This is
land has been glaciated and
eroded to a great extent and in
addition the luxuriant growth of
'imber and underbrush makes it
hard and difficult to prospect.
However, the prospector can
trace mineral deposits to their
cource in many instances by
panning the small creeks, which
are numerous and have their
sources near the summits. ’
Many of the creeks have
washed and carried out silt to *
bedrock which will give the
prospector opportunity to deter- '
mine the character of the for- ''
mation. Very little has been ’
done in the interior of the is
ALASKA NATIVE
SISTERHOOD
President Mrs. A. McGilton
Meets Every Monday
Petersburg - - Alaska
Sitka Mercantile Company
General Merchandise - Meats And
Fishermen’s Supplies
Sitka ----- Alaska
G. H. McGrath
General Merchandise - Fishermen’s Supplies
Agents for Union Oil Company And
Alaska Steamship Co. McGrath Dock
-x
Sitka - Alaska
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