The weekly Ottumwa courier. [volume] (Ottumwa, Iowa) 1857-1872, 1871-02-09


cent Geological report offhis State,
gives what Ne deems to " the cause
Of tho prairies Of the wsst. It has
bssa e91 still j. deabtlesr
gu and nay ! pr e ais suc
that is. hs time ~ liver COZ
when - learned snd semitic NJ
'Agres upon the cause 0f-prairiss.
The Professor says:
II is Estimated that about seven.
sights Of the surface Of Iowa 10 prai.
RE, or was no whom the State was
Ant sstslsd. IThsy are not confined
70 the level surfaces hat are some.
times sysa quite Ailly and broken !;
and il has inst been shown
that they are not cosfined to any
particular variety Of soil for they
prevail equally upon Allsvial, Drift,
and Lacustral soils. Indeed We
sometimes dnd ! single prairie whose
surface includes. oil these varitics,
portions Of which may b. reapec-
lively sandy, gravslly, clayey or
loamy. Mother are they confined
TO the region Of nor does their char.
actsr seem ct al dependent upon the
formations Which undsflie them, for
within the Ststs Of flows they srest
apoa 81 formations, fton thoss ol
Asoic 70 those Of CrssassosA .sAs;-
ol.a;s4, wAsch snbraos almost al
kiads Of rock, such - qasrtsite,
ftiabls saadstons, nagnesian lime.
stone, common limestone, impure
chan, clay, ciaysy, and sandy shsles,
10. Southwestern Ainlssotais 81.
nostens continuous praaris upon the
dnn which rests directly upon, moi
only The hard Sioux quartzits bst d
20 directly spon The graaits. yhai
:, TAaA whatsvsr ~ ,sr;e;a or CHI
prEinss nsyrhAss bssA, 1--WE have tht
positive sssarsnosdtAss their present
| sxisssscs ID Iova ana IL isadn ediat,
y,Siaity, y not AZ p thss ipAissc,
~ eiir.A. ~. .h.,..1.. 80 - s. 9,
s;.,c. II 49,, ~. Z. az Ss
! =, a. -, ~ 80 s.si.ss,s. - -.
....,I.s7 S. 49,, @. ag.!aa.s -,
| ~. 49, A..:.-..T- -. -, !, ~.
:. :, Z. ..'s 1T
s.I :" 49,, :. -. cf' -
~ - - .sS 800 : ~ Rss III 9
~ 1880 go, !. 49, 80 b oes,
fv, s. 49,: y,sseo aSs.n S y.
j - 49, =, ''..' '1 ls - Ps'
4 - - ., ,aiis9i,Jo, eli.l;g eli' Z
.us nr 70 nsve eteeod 4Ap's . g.
waas are deemed /" 70 - lsgt' = 4
aeae &c ls ssom snsn. The follow
tAksfs oASfsd only a. suggsstioaa
We nave no sylesecs y chow o. sol
gess that any On thst raissss svsr ha'
a!ovsh ofsr 70 spoa Them them MOI
'a''..a'a ~ laot saa s.' snose .
~ 4 80. ~ s,, XII 49, 2 me -
I. - oro.th 81 - tr.e. 49,, 49, =
introduced. .if protsot.d f,o,n i
srss. 'Tsero seams "a IA no 90. 30
rsason Why W. should regard u
forest as any more . natural or moi
NAL oond,soa Of the ssrfAcs than Is
prairiss srs. IAdeed, : II ssens n
more satsral inference that the Of
clpaAon Of the mi hoe By Ahe forest
has taken place By dispersioa fror
original csntsss and that they. y
cFoachsdi upca the iunoccupied ssu,
ace until met and checked By tn
destructive power Of the frss. ..7
Then arise questions like the fol
flowing, NOT easily answered and 70
which NO answers ars Il present DIN
posed ; when Was frs. frat, intr,
!, daoed upon tho pr.iries. and how
Could any but human agency hs~
introduced annual ,fre.e 3 upon tham
/ tsthev conla h.,. ~, 1920, I, !. !,
.iop,v hv thear.nov - nan ~ Il,
the, forests NO, oco,nr ths,. i, p.r.i,;,
before ma. came to ; ;,,,l !. I. I;
a.. .;,.. =. .'--... -
dency to eBcroach spoa tbs praisis
q soon - tho, 6rea A. nad. !,
~.>.As 90
S PSsaEl SOa0SsSes SAle
I'd - sacA alness imuAsdhtsly sfts'
the close OF the Glacial epoch. DID
nan thsa .s exist and posssss, the ass b
6ss tAAti 10 mixAs hxSe annually
e.
80. =. III h 80 = 800 - sss pafs
$3.50. -. S' . :na Spns n .HSc. COZ :.
=. NJ . Y.sxes'se .1e enef:sah mont
$500. -, ii, 800. .sne y - .sss these
|..-,--rss ..,.. 70 esN''A''ol,,9
$50 49, oss no's'oe u moro Cyl