The Harrison times. (Harrison, Boone Co., Ark) 1876-1938, 1899-09-30

: carboniferous formation, designate
as tbs { heIpkes llaaestazzzua1z
: lead and zinc ores in the Southwest
In the area covered by the sub-car
boniterous rocks are situated tn
mining camps of Aurora, Webb City
CRANKY and Joplin in Southwes
} Missouri, and Galena in Cherokee
county, Kansas
OF the formation in which the zin
ores are found, of the general law o
mineral occurrence and of the proba
BILE extent of ore belts Prof. Jenny, il
his report, expresses some opinion.
which will be read with interest.
The Cherokee limestone Prof
Jenny says, covers an area of more
than 1000 square miles in the south.
west part of the Ozark uplift, ex-
tending over the vicinity oil Spring
held, IN Greene county, Missouri, to
Grand River, in the northwest por-
ton OF the Indian Territory. In
Missouri this limestone is the pre-
vailing surface formation in the
counties of Greene, Lawrence, Jasper
aud Newton; it covers he southeast
part Of Cherokee county, Kan, the
northeast portion of Indian Terrific
nv, and a limited area of northwest
ern Arkansas.
when not denuded, this forma-
ton has thickness of 1S5 to 900
feet. In the area covered by the
Cherokee limestone the strata are
nearly horizontal gentle sYnclina1
anu ttu tlGlllldI lOllS
course OF rne streams the region is
cut by shallow ravines, while the d.
yides are broad, high prairies. Eos
sis are abundant in this formation,
which is probably the representative
of the Warsaw or St. Louis epoch of
the sub-carboniferous. The Chero-
kee formation is made up of beds of
limestone irregularly interstratihed
with layers of ebert. A marked va
ration is noticed in the relative pro-
portion of the ebert and limestone;
in localities frequently but short
distance apart, the Cherokee is seen
to change from a massive limestone
with only occasional nodules or in
cluded layers of ebert, to a stratum
made up of alternate thin beds OF
ebert and limestone, in which the
ebert exists in larger proportion.
Analyses of the Cherokee lime
stone show that it is uniformly a re-
markablv pure carbonate of lime,
averaging from 90 to 90 per cent OF
carbonate of lime, with traces OF
magnesia, alumina, oxide 9f iron
and insoluble matter. Organic mat
ter and bitumen are present in APP
preciable quantities, and from the
solution of the rock by the chemica'
action of surface waters the bitumen
is liberated and collects as thicl
pitch in the cavities. Owing to th'
purity of this limestone and it,
coarse-crystalline character, it il
readily attacked by surface waters
subterranean erosion forming mum
erous caves and sink holes wher
this limestone outcrops near the sur
II face. The ebert Of the Cherokee for
nation is white, bluish-white or bui
Y in color, breaking with smooth
4 conchoicdal fracture. BY analysis i
contains 90 to 90 per cent of silica
with traces of alumina and oxide c
~ N.out 8 or 4 per cent of tn
s5;.~,J',t,s, -; :, hydrousco condition
re ana is soluble N ASTON of pota,
ale stun hvdrate The chers~.Lact..
nd okee is cleanly separated from, ,
Mt interstrati6ed limestone, though
~. intimately interbedded with the L
off ter, the siliccous nodnles and lay
ere occur pure and distinct in the m,
ed OF the calcareous rock.
ad TIE Cherokee limestone is not
Is. erywlere ore-bearing, but, follow
-a- the general law of mineral occ
ut, renee, lhe ore deposits nave ht
ms formedonly in local areas of distu
he anee. Between and surroundi
A." such ar9s of naturalization exte
in broad barren tracts oft undisturt
'at strata The larger number of