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Level III Ecoregions of Arkansas

Revised April 2000
National Health and Environmental Effects Research Laboratory
U.S. Environmental Protection Agency

level III ecoregions of Arkansas region 35   35. South Central Plains
region 36   36. Ouachita Mountains
region 37   37. Arkansas Valley
region 38   38. Boston Mountains
region 39   39. Ozark Highlands
region 73   73. Mississippi Alluvial Plain