The Harrison times., 1901-02-09

pear almost like pure ore, and also
where the lead occurs in a body be.
tween fat layers Of Sulphate of Bar
ytes, that likewise frequently con-
tain crystals of galena Associated
in the same rock with the lead there
is liable to occur some pyrites ofiron
and copper, and even cobalt and
nickel are found. There are also YER
tical assures, both "True Veins" and
Cash Veins" The former, almost
invariably filled with gangue matter
and, if mineral bearing, is liable to
contain galena, pyrites of iron and
copper, zinc and cobalt, associated
with quartz. calc spar and sulphate
of barytes or heavy spar. The true
vein is the most promising occur
renee of mineral arrangement, and is
of unknown depth.
Although the White Lead rock is a
Magnetism Limestone. it in places
is quite silicious and almost passes
into quartzite which causes one to
suspect transition from one into
the other. 1t is well known that
iimestones, and more especially
those of coral origin are frequently
seen that have undergone a change
into sandstone. Several specimens
obtained on Black River, in Rey-
nolds Co, Mo-, afford an excellent
opportunity for studying the pecu-
Ilar character OF this most interest
ing rock. One CT them that appears
to have been originally white has
been greatly altered, and changed in
color to a light brown where pits
and small cavities exist that are lined
or partly filled with calcite crystals.
Another is pinkish white with lami-
nae or bands of blush gray color,
and the whole of them so altered
and hardened as to appear very SIM
lar to quartzite There is evidently
a presence of feldspar which, with
the quartz would suggest. at least,
an origin from worn out and decom-
| posed GRANTEES that had been subli-
mated with carbonate of lime from
everything limestones. The white and
gray specimens contain pyrites OF
iron and copper, stains of green car
Donate of copper and disseminated
lead. No fossils have yet been found
in this particular rock, although a
chin seam Of siaty material rper
which it rests contains many fossils
of the Lingula.
Next in ascending order comes
what miners term the Dead Rock"
SO named on account of it's almost
total barrenness of mineral, although
there occasionally is very sparse
dissemination and short, narrow
veins of lead that serve as indicators
The thickness of this rock varies
greatly: being approximately 20 feet
at Mine La Motto, 145 feet at Flat
River and about 300 feet on Big
river 81 mile west of Irondale. Its
Theological character appears to bs
the same throughopt. Near Iron
dsl~;+ ;~-A- eyeecdingly homogen-
Gus mass. very hard and brittle
compact, fine grained, gray of color,
and has grit and appearance quite
resembling a sandstone. This brings
us to the so-called BLACK Lead" o.
the miner, which very probably re
ceived it's name from the color. AT
Mine LaMotte, it is % feet thick
is more or less argillaceous and
dark colored throughout. Dark ano
nearly black shale beds overlie anC
underlie it and thin sheets of tn,
same material occur at intervals anC
separate the limestone into differen
horizontal sections. These shale
are full of Lingulella fossils.
The Black lead contains less cavi
ties than the White lead, and the or
is more generally disseminate
; throughout. Associated with th
lead of this u MEMBER occur most c
the ores of copper, cobalt, no ps;n n1
rites and nickel that have been found,
which however are not in sufficiently
pa ying quantities.
The White lead rock is far more
persistent of the two. The Black
lead becomes gray toward the cast,
and at Black river its thickness is
only about 6 feet, while in Reynolds
county and near Irondale it appears
to vanish entirely. These two hori-
IONS, the White and Black leads are