Grant County herald. [volume] (Lancaster, Wis.) 1850-1968, 1878-02-21

acterizing dolomite. 1t is very hard,
compact, and close grained, of gray
ish-white color. Beds of flint or ebert
are contained in all the strata, irre-
spective of geological position, differ.
ing however considerably from the
flint found in the Galena limestone, in
that they are more regularly segre-
gated, forming layers by themselves,
and are not so promiscuously distrib-
uted through the formation.
The flint of the Lower Magnetism
limestone is much whittier and more IL
able to decomposition than that OF the
Galena. There are also frequent ge-
odes and cavities lined with drusy
quartz.crystals, which have never
been seen in the Gaena limestone, but
are very abundant in the Lower Mag
nesian. The crystals are of many col
ors, white, yellow and rose predomin-
ating, and often affording beautiful
cabinet specimens.
A good general idea of the formaA
ton may be obtained from the follow
ing descriptive section, taken from a
bluff at the mouth of Green river, on
the Wisconsin, situated on the n. w.
Or. of Sec. %, T. Z, r. 4, w. Upon
the summit of the bluff, there was con-
siderable sandstone scattered about,
although none could be found in place
1t was found in place on the other
side of Green river at about the same
elevation, consequently we may as
sumo that the top of the bldff is quite
near the top of the formation:
A. LOWER MAGNEsIAN LIMESTONE
Feet
i. Slope Of hill Ito top of vertical cliff
composed OF heavy-bedded light
gray, Magnetism limestone strait
tication quite regular, contains no
fints; good building stone. .... 81
z. Hard, compact, heavy bedded, light
colored limestone, lines of stratif-
cation not distinct; full of irregu-
lar masses of flint, which compose
about half the bed /; exposed in a.
vertical Cliff. ............... So
.. Slope OF hill covering limestone, not
well exposed. ....... ......, %
4. Coarse grained limestone, weathering
irregularly, on exposed surfaces, con
tanning few fints disseminated
through it, and occasional druses
ol quartz. z
D. Gray limestone, very hard and COM
pact, regularly strathed, beds from
one to two feet thick, containing
no UntS. .................... 20
6. Crystalline, gray, Magnetism limestone,
with a few iints irreguarly dissem-
mated; beds two feet thick 49,. %
z. Hard, light-colored limestone, crystal
line In texture, weathering but little
on exposure; beds about three feet
thick; contains no f1nts. ....... &C
8. Fine grained, straw colored, slightly
arenaceous, Magnetism limestone;
beds about one foot thick; stratif-
cation quite regular. .... 20
8. Irregularly bedded dolomitc lime
stone, has sometimes an Oolitic
structure. Z6
10. Yellow, arenaeeous limestone, transit
ton beds. The sand appears in
rounded grains. separate from one
another, and connected together
with lime; qualification indstnct.-
~ marked. %
b. PorsDAM SANDSTONE
II. Hard and compact sandstone, in beds,
from two to four feet thick, unfos-
shnerous. INSTRUMENTATION. 20
r. Very coarse grained, yelloy sand
stone, Gathering in rounded mass
es; exhibits cross lines of deposi-
ton; is very soft and friable. -. IS
ID. Slope of hill probably covering sand
stone .............-..... l5
IA. Steep slope of Hill to water in Wis
consin river; this is probably the
place of the shaly, argillaceous
layers .............. .....- 90
-
Total thickness from water to top
of the bluff. ............. $50
Total thickness of Lower Magne-
sian exposed. ........ a39