Lewiston teller. [volume] (Lewiston, North Idaho) 1878-1900, 1899-07-15
Mining Pointers.

The slow backward movement of abb
- faces, due to weathering, has
,I allied the recession of cliffs.
Quicksilver is obtained ON the Pacific
frou four minerals-cinnabar, meta
s;nuabarite, native quicksilver and
tiemannite
when making application for patent
to placer gr ,und, care should be taken to
,.,s,miue the exact classification OF the
u and clearest evidence possible
should he president
The development of mine is explor-
alton. The stopping and working of
..;,s after it is developed is EXPEDITION
GOOD maxim in mining is keeping ex-
Iteration we'll in advance OF exploitation.
A Normal fault is one in which the
HANGING wall has sunk relatively to the
soot wall and reverse or thrust fault is
ON. in which the hanging wall side has
moved upward relatively to the foot wall.
II has been asserted that all pyrite con-
,sins gold in some amount, but careful
tests have been made by some of the
most expert chemists of the United States
geological survey and pyrite frequently
touud which showed no trace of gold.
The greatest placer excitement ever
known will be withen the borders of
Idaho county within year. III the
northeastern part of the country there is
comparatively unknown placer field, yet
of which sufficient is known to prove be-
yond question of doubt that it is i'm
meusely rich in golden sands.
In the early stage of development of
quartz mine it is often impossible to tell
whether or not the ground is more value
able for mineral or agricultural purposes.
vein small and low grade upon the
surface may develop into valuable mine
in depth Several such instances are of
record.
An anticlinal fold is one in which the
strata dip in both directions from the
crest of fold. A synclinal fold is one
in which the strata dip toward each
other from opposite directions. A
quaquaversal fold is one in which the
strata dip away in all directions from the
crest of an uplift. A monoclinal fold is
one dipping in one direction only.
A simple assure vein is one having
we'll defined walls, nearly straight or
slightly curving strike and. Pieces of
the country rock are often included, as
though they had fallen into an open
creyice. Such vein as this not infre-
quently has a banded structure. This
is the type of vein frequently figured in
text books but not often seen in nature.
When using hanging bolts in shafts,
use only large sized iron washers. There
is no economy in small washers. four
or ive-inch washer is far better the one
two and a half inches in diameter, for
should any downward pressure exert
itself the small washers will sink into
the plates and there is sure to be
subsistence in the shaft sets. Large
washers will obviate this to great ex-
tent
A long tunnel is to be run through the
Syndicate mountain, in the Burnt creek
district of Idaho. This is the mountain
upon which the famous Syndicate group
OF claims is located. Superintendent
Johnson of the Syndicate company, who
is mining engineer as we'll as miner
divide experience, has submitted to the
company his plans for working the big
group, He proposes to start tunnel at
creek level on one side of the mountain
and to run it to cut five veins which
crop ont on the mountain on the
company's claims. This would gain a
depth of 400 Feet on the first vein, and
much greater depth on the further ones.
The superintendent estimates that the
hrst vein will be cut within 80 days from