The Harrison times., 1901-03-02

being a deposit of black ferru ginou S
sandstone exposed to the thickness
of % eet,-being fluted frequently,
and resembling in its outward ap-
pearance, a rough variety of Pig
Iron He also refers to the place OF
this sandstone, in Green county, as
probably being below the quater-
nary clay, and appearing to rest i'm
on the Lower Silurian
rocks.
LIMESTONES.
nnisuther tbick.b .bedded magnes-
ian limeStoneS where the ores of zinc
and lead are to be found, and it usu-
ally occurs that the zinc occupies the
lower level. AS shown on the map,
these limestones constitute the sur
tace or country rock, extending
from Fulton and Lawrence counties
Oh lhS SoSl " DOOHS anu SdtlOl
counties on the west. Every one of
these counties can be reckoned on as
possessing rich treasures of lead and
zinc, and some of them may not tall
far short of the two that have been
figuring most prominently before the
public. For superiority with respect
to cheapness OF mining, Marion
county, as whole, no doubt holds
In addition to the con-
tanned ores there is quite an econom-
ic value to portions of these lime
stones,-for building purposes, max
ing into quick-lime and for fertilizing
where the soil is principally silicious.
Some of the more argillaceous
strata in all likelihood will be found
valuable for cement manufacture.
The changes occurring in the differ
ent members of the 2nd Magnetism
limestone series are quite frequent,
and it would be difficult to give 2
description of them that would gen
orally hold true. While dense and
hard in one locality, the same mem.
Der a few miles away may be com.
paratively soft, less crystalline and
even shaly.
LEAD.
The lead OF Northern Arkansas, SO
far as present experience goes, is
confined, principally, to the Subcar-
boniferous formation, and conse.
quently overlies the marble. 1t
however, at times is found in the
2nd Magnetism limestones, not only
IN openings, but also in the regular
ly disseminated form. 1t has an ex
ceedingly clear, bright lustre on re
cent fracture, somewhat resembling
polished steel,-differing much ir
this respect from the lead of South
western Missouri. Owen describes
the lead from Woods mine near the
head of Georges Greek as being pure
sulphuret of lead, without any i'm
purity but a trace of silver. Speak
ing further of lead ores he states,-
"Galena, sulphuret of lead, is th'
only ore of lead as yet found in tn,
northern counties of the state.
They are almost pure sulphuret o
lead containing 1874 parts of sui
phur to S6.6 parts Of 1ead). being
perfectly free from zinc, antimony
and copper; only three of them con
tanning appreciable quantities otiron
Analyses showing average compost
tion and purity of galena from tn,
CRANKY region give the followin,
parts: Silicious, O.61; lead, S4.O6
iron, O.16; zinc, 0.94; lime, O.42
silver, 1 u OF. to ton. This is abou
the purest lead of the Joplin district
Regarding the origin of this ore
the opinion of no one is entitled t.
more respect than that of DIR. Owen
Showing that he was fully alive t.
the Importance of the subject, b
started out in an effort to reach
conclusion through analyses of tn
different rocks with which it is asso
ciated, and in which it is contained
but LETT no theory or opinion base,
upon such an hypothesis. He later
however, says,--"Some specimens G
the ore found at these mines, cOnve
theidea of a simultaneous deposition
of the zinc and doiomite (calcareou
carbonate of magnesia); J; while other
rather indicate an infiltration of tn
zinc through interstices OF the pre-
yiously formed rock. Perhaps tn
most probable explanation of thes
phenomena, is that the ore was frs