The Tipton advertiser. [volume] (Tipton, Cedar Co., Iowa) 1856-1962, 1868-01-09

..-a - = .-aaaaaz...l..sg. -
thewcsthe a,sttssn s,sFseasgsussponW'
deeper parts Of the hiss, which, - -
fore said, are never very dssp, 1Ae1h
feet being probably the grs1eese dsygA0
any. The change Ia tho chsr1eeog g
their shores has been producsd entirely !.
by the ice, aided by the bassins e NJ
waves. -6aaf a 4ys4 4ssSa arI
The walls" q, moro psspsssy -
bankments, are really vssy intsssselao
natural objects, and u b not sospsls1a0
that they have attractedson1s a1oeoeDoGA !
They vary much In hight and u1d1E -
we'll rs In the materials which oo0o~
them; some times they An peinclpn11p
Of boulders, but more oftan ~ snno,
gravel and earthly material thrown -
OF the bed Of the lake. In many -
stances where n peat marsh sxtsudp e.
like an arm Of the lake, 1t b entirely
separated from II by an embankmsot e
turf thrown up by the same assacy, bus
Of turf because that aud no other makse.
ial was within reach Of the leo. Theso
turf embankments sometimss hsvo =
growth Of willows upon them, and have
been called beaver dams; hut bsAvoso
never attempt 10 dam still watssUI--
They dam running streams 10 obtaiA
ponds Of still water. These turf sm.
.bankments very much resemble the 49,
terial thrown out Of q ditch in drnlnlne
marsh. but their origin = unuAieeak~
| able. When the embankmenta -
composed principally Of bosiisss, thee
are usually thrown up from two to four
feet high, and from five to fifteen fese
wide, aud imbedded In sand, gravel smd
earth, the outside Of the embankmeue
being usually as steep rs the inner or
lake side; and the latter often 6aintly
resembles an artificial levee. Although
they sometimes have q degree Of rexu..
larity, the boulders which compops
them are never arranged In any order.
nor Is there an appearance Of any work
of art upon them. W.. ~.
| The enhankments always separate 4
| piece Of low ground from the lake. bue
where the adjacent land is higher than
the highest water of the lake, no en-.
bankment is formed, but the materials
are simply crowded against the shore
until bold, steep bank, often covered
with boulders. Is produced. aa.
When they are composed principally
OF sand and gravel n broadly rounded
ridge Is formed such as we would expect
from those materials; but when com.
posed of more earthly materials they are
often very steep and very narrow, and
supported by growth Of vegetation up-
on them. Such as these were seen On
the east side of Rice Lake, where they
are In some instances SO narrow that two
persons canhot walk abreast upon them.
although they are from four to SIX feet
high. In other places they are often
wide enough for wagon, but never
sufficiently even for one.
The water in these lakes is almost al.
ways low in the latter part Of tho year.
and the frosts Of winter still further rs-
duee the actual depth, SO that very
little unfrozen water remains In some oi
them. This Is often known to be the
case, and only few winters ago nearly
all the fish of Wall lake, In Wright
county, were killed by that means.
1t is evident that wherever the Ice be.
came frozen to the bottom of the lake, it
would freeze fast to, and in many ir.
stances inclose the bouldcrs and gravel
which were strewed upon the bottom.-
Now when spring returned, the ice be-
Ing raised by the rains and melting
SHOWS, would be carried with its
burthens to the high-water shore by the
prevailing wind. Let this process b
repeated year after year, from age to age
and it Is evident that all the boulders
within reach Of the ice would in time b
taken up and carried to the shore and
left exactly where the force Of the Ice
ceased to act. Added to this, the almost
constant dashing of the waves against
the beach during the warmer parts OF
the year would have the effect Of carry
ing out large quantities of gravel and
sand which would completely imbed
the boulders. There Is also another
cause which doubtless assisted more
than any other in giving the embank.
ments their definite form.
The whole surface of these lakes freexes
up almost simultaneously, and to con.
siderable depth. Now the natural ex.
panson of solid cake Of ice, from halt
mile to five miles in diameter, has, as
l every one knows, enormous power, quite
:, equal to any amount required to throw
up any and all the boulders we find In
the enbankments, or crowd them thick
ly against the sleeper shores. No natur-
al force would bring them back again,
: and the annual repetition of the forces
above referred to affords sufficient ex-
PLANTATION Of these phenomena.
1t may be thought by some that the
processes described would be too slow to
produce the results which we see, but
slowness is quite in keeping with the
mightiest operations Of nature. The
miila grind slowly but they grind ar.