Pioche daily record. [volume] (Pioche, Nev.) 1872-1876, 1875-10-19

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,toms became polarized, and arranged
according to the magnetic at
raction Of the earth, precisely ne we see
he mariners needle obeying the same
Jaw of magnetism at present. Upon this
Macintosh attempted to ex-
plain the reason why stratifed and meta
rocks nearly always have their
cleavage strike. or easiest splitting seams
toward some point in the Arctic
and Antarctic circles. BY the came
method Of reasoning he attempted to
show that when extensive mountain
chains were lifted up by volcanic forces,
they mainly assumed polar direction,
for the reason that the
rocky zone through which they we're
lifted bad its points OF least resistance,
or cleavage planes, arranged in polar
direction, and therefore the ootruding
masses literally split the earth from north
to south. Macintosh further held, that
the profound assures, which are now
filled with slick and mineral ores, were
all formed by the same law OF polar
cleavage and by seismic violence. The
more recent investigations made by Hum
boldt, Lyell and Hopkins not only show
that Mackintosh's hypothesis was not
chimerical, but that it furnishes the key |
to the grand secret of rock-crystallzation,
mountain and assure formation, and to
the laws governing mineral deposition
from chemical solutions. For thirty
years the eminent English mineroloRlst
and author, Hopkins, spent his life IN
untiripg endeavors to ascertain the geo.
logical and chemical conditions OF nearly
every important mining locality on the
globe. and the result OF his labors was a
substantial Endorsement Of Macintosh's
| theory. namely: That all the rocks have
| polar cleavage planes; that oil true rock
| assures have been formed by the splitting
of the rocks along such cleavage planes,
and that the slick and metallic ores have
been precipitated into the assures from
aqueous and chemical solutions by mag.
netic affinity OF molecular particles.
As the law of familiar rock structure is
conspicuously observable at Phoebe, and
at many other points in the extreme
eastern portion OF Nevada. thought a
chapter upon that subject might not be
out of place at this juncture and that
is my apology for the seeming depression.
Meadow Valley and Dry Valley, two
noted valleys In Ely District, are sepa-
rated by high ridge or mountain spur.
which, contrary to the usual trend Of the
mountains in that region, has general
strike or bearing toward the southeast.
This peculiar spur is bisected by a deep
and precipitous canyon, which has been
utilized as passageway for railroad
from Phoebe to BullionvilIe. By refer
encelto Lieutenant G. M. Wheeler's to.
biographical map of Eastern Nevada, il
will be seen that the spur to which al
lude is simply the terminal extremity Of
the Ely range, slightly DETECTED from
the general northern trend OF the main
range. OF course this bend in the noun
, tains forms sort Of typographical cres
cent and 1t is upon the concave OF
eastern side of the crescent tina
the mines and city OF Phoebe ar,
situated. In this connection it may
, be well to note the fact that the most o
, the Ely range, as we'll as the Meadow
, Valley spur, are chiefly composed o
, azoio limestones. with occasional yes
, tiges OF volcanic action. On the western
slope of the great limestone crescen
, there have been many mine Locations
> made, but in most instances the ledge
3 are narrow, uncertain in strike and dip
: and the ores are either OF very low grad
9 in silver, or are excessively based will
: lead or other rebellious minerals. l
! cannot be denied that a few OF the ledge
I on the western side of the Ely rang
have yielded some surprisingly rich ores
! but as rule they obey the general Law
b OF limestone deposits, namely: The,
: are unreliable in Development; or,
/. usually heavily charged with rebelious
: metals. and are the source OF constant
b perplexity to mining men and stockhold
: ers. As the Phoebe mines have alread,
Q occasioned much expensive litigation, ant
r may possibly occasion many more dis
g astrous lawsuits in the near future,
d propose to treat the subject of lime de
!. posits in that locality very gingerl,
II and shall here promise not to make in
Fl vidious distinctions between the mine.
b on the eastern side of the crescent, bu
o shall confine myself strictly to descrip
N ton of the geological surroundings.
o l have been specially minute in de
l. scrbing the Meadow Valley spur OF tn,
b Ely range, for the reason. as will pres
It emily appear. that the detection of tina
n spur toward the east had much to d,
y with the perplexipg disturbances whicl
70 occur in the quartz lodges at Phoebe
d The true matrix Of the Phoebe lodges i
= broad wei. defined znns a. hi. =
- opar,zite which has di,ao. o,,;na y
= trend nearly dine north and son,h on,
, which is literally n wide saam 81 nrorta
IS lite wedged in between unbroken walls O
a mountain limestones Tba aas,orn 90,
"a wage of tho preat belt contains soma ma,
y row seams of slate and nronvi;,o hn, IN
- main mass of The zone "a s;wnlT bar
- onortzite On the sonthsrp s,ona :
I the Meadow Valley snnr 60 frsnnsn,,
=, referred To. nj n noint nbont fonI nils
d north Of Bnllionyille wa catch Tho srs
10 plimnses az The Piocbe onart,ita ha,,
N From that point The bait strikes bnld,
!. thronoh the ridge PASSES nnasr pio.h.
y, and finally lost in Dnck valley na0r pa,
le terson District nv refsreHca 20 ~
man il will be readily seen that Tho 90,
erai strike Of the bell as aboya ;na;oatst
{. ia nearly due north and south m
,f cleavage planes of the ouartz,ts ara ;,
- markably well defined md II ia tber,