The Elk Mountain pilot., 1882-03-23
Nv ANSWER 20 OBSERYE1
nv ISSUE OF MARCH end.

DENVER, March IS, 1852,
Mr.. EDITOR: Myattention has been
called to a letter signed Observer
in your issue of the 9th. Willie sob
server" is disposed to be very fiat
tering to your mining camp, yet his
theory as to the formation of jour
region is as detrimental and danger
GUS to your mining district, as the
fallacious and pucrile theory advanced
by that professional "dead beat"
Jacobs. Why, Mr.. Editor, the theory
advanced by" Observer" is identical
with the copper crust y" theory ad-
vanced by that geological ass" as
the Resls!ty- CAL denominates Jacobs.
Observer says: "When we consider
the nature of the upheavel and the
manner in which the rock crust of
your mountain ranges and their vari-
GUS spurs are broken and declined,
we must eoueLnde that there are m0ny
IAna leads lying beneath any sa,7ase
tndIfQAons." This is senseless jargon
there is no such thing as leads in
mining.
Again Re says: "To compare great
things with small, everyone is familiar
with the manner in which thick ice
crusts on ponds and rivers are broken,
and heaved up in ranges by some
strong lateral force. If we examine
these lines Of fracture we will find the
blocks of ICE to be disposed towards
one another in various angles and in
clinations and that where two blocks
are raised upwards, or one is pressed
downwards, making declination from
Its adjoining block, that the point or
line of fracture in such cases, is wide
at the top and pinches together below.
In other words it produces a cash
vein. In other cases, however, where
two blocks lay contiguous to one an
other and have corresponding decli-
nation all the fractures IN such cases
are pressed together, or closed at the
top, and opened at the bottom. In
such cases the fractures represent blind
lodes. There is much analogy be-
tween this condition of the ice and
the broken condition of the rock crust
in your vicinity"
If this theory, Mr.. Editor, is to be
sustained by the facts as developed in
the workings of your mines, then you
have no Fissure Veins" in your
Camp. But this We deny.
First comes Jacobs and says your
district was covered with mud crust,
emanating from a Mud Volcano, and
that when the mud dried 1t cracked
open and thus your veins were formed.
Next comes Observer and says that
this crust was cracked open by
lateral force and thus your veins were
formed. Analogy would teach that
the veins therefore exist only in the
crust, because if the veins existed un-
derneath the "mud crust" or ice
crust" lateral force sufficient to
elevate and depress the crust would
close the assures underneath the crust.
There are no cash 1eius in Ruby.
Why? because cash vein exists only
in stratifed rock. Professors New
berry, Van Gotta, Whitney, Bauer
man and all authorities agree that
"gash veins are limited to single
stratum or formation, and hence are
limited in extent both laterally and
vertically" Now to my mind, while
the physical character of the silver
bearing veins of Ruby resemble cash
veins, they are really appendages to
true assure veins and occur IN a coun-
try that has been broken by subter-
ranean forces. The veins near Galena,
Ills, and the La Motto mine, Mo-,
and the Victor mine, Colo. are essen
TALLY cash veins. The ore filling the
gashes is indigenous, having been
derived from the teaching of the ada
cent rocks, while in the veins at Ruby
the orc is exotic, having been brought
up through assures from a remote
source below. However, authorities
differ about the system of veins exist
ing in our state. Mr.. T. A. Green in