Ecoregions of Iowa and Missouri 97° 96° 95° 94° 93° 92° 91° 90° 89° M
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Ecoregions of Iowa and Missouri 97° 96° 95° 94° 93° 92° 91° 90° 89° M i 51 47 s s r i e Sioux s v 52 i s Falls MINNESOTA i R p x u p o 52 i i S R 46 g i i v B e r W e 53 s Decorah A t T F Madison O Prairie Spencer o K rk Mason City du Chien 43 43° A D 47b ° D e s 47a M H o T r e in U v e 52b i r s O R e S v d i R y R i M o v l x er i F s u sou o ri i R S Storm i 47d v e Lake e tl 47c r it L Fort C WISCONSIN ed Dubuque Dodge ar Sioux Waterloo R ILLINOIS iv City e r 47d r e iv R Cedar 42 42° Denison Marshalltown ° Ames Rapids er Io y wa R Bo iver Clinton 47m 47f Iowa City Des Moines Davenport 27 72d Muscatine Omaha Lake Council Bluffs 47e Redrock 47 Sku nk Ri ve r 41° 41° Ottumwa Lincoln Creston T D h Rathbun e o s Burlington m Moi p Lake ne s s o Peoria n R iv R er i v e r IOWA MISSOURI 54 40a Maryville Kirksville 47d 27 M NEBRASKA 40° 40° i s r s e i s v i s R i n p o p t i i r Springfield a h Thomas Hill Gr C Reservior Hannibal St. Joseph and R iver R i Salt R v i e 72 ve r r r e v i R e tt 40e la P Richmond s River Kansa River 47d issouri M Mexico Kansas 47f 39° City 39° Topeka Columbia 72d 72e 72f Warrensburg M 40c Jefferson is S s ouri r 72 A City R e St. Louis S i v N r A 39k e K v 39e i R e a d 28 on Lake r c e s iv a of the R G ge Ozarks sa Harry S. O er iv R Truman c 40 Reservior e m a r 38° 38° e M Rolla Nevada 39g 39i 72e Farmington 40d 72f 39d 39f Stockton Lake 39h Cape Girardeau C o Riv urr hi er e O Springfield nt Ri Eminence v e 72f r 39j 39a B Joplin la 37° ck 37° R iv OKLAHOMA er 74a Poplar 29 Table Bluff 73a ive Rock e R r 39c it West 73b Lake h W Plains New Madrid KENTUCKY Lake 39b r TENNESSEE e O' The v 40 i Beaver ARKANSAS Cherokees 39a 73 R Lake Bull Norfork Shoals Lake 73 Lake i 39 p Tulsa p i s 74 74 s 39 i s s i 36° 36° Fayetteville M 38 38 65 96° 95° 94° 93° 92° 91° 90° INTERIOR—GEOLOGICAL SURVEY, RESTON, VIRGINIA—2002 89° 39 Ozark Highlands 40 Central Irregular Plains 52 Driftless Area 39a Springfield Plateau 40a Loess Flats and Till Plains 52b Paleozoic Plateau/Coulee Section Level III boundary 39b Elk River Hills 40c Wooded Osage Plains Level IV boundary 39c White River Hills 40d Cherokee Plains 72 Interior River Valleys and Hills State boundary 39d Central Plateau 40e Claypan Prairie 72d Upper Mississippi Alluvial Plain County boundary 72e Middle Mississippi Alluvial Plain 39e Osage/Gasconade Hills 47 Western Corn Belt Plains 72f River Hills 39f St. Francois Knobs and Basins 47a Northwest Iowa Loess Prairies 39g Meramec River Hills 47b Des Moines Lobe 73 Mississippi Alluvial Plain SCALE 1:1 800 000 39h Current River Hills 47c Iowan Surface 73a Holocene Meander Belts 20 10 0 30 60 mi 39i Eastern Ozark Border 47d Missouri Alluvial Plain 73b Pleistocene Valley Trains 40 30 20 10 0 60 120 km 39j Black River Hills Border 47e Steeply Rolling Loess Prairies 39k Prairie Ozark Border 74 Mississippi Valley Loess Plains Albers equal area projection 47f Rolling Loess Prairies Standard parallels 37° N and 43° N 47m Western Loess Hills 74a Bluff Hills.