er54a - Illinois/Indiana Prairies |
er54b - Chicago Lake Plain |
er54c - Kankakee Marsh |
er54d - Sand Area |
er54f - Valparaiso-Wheaton Morainal Complex |
er55a - Clayey High Lime Till Plains |
er55b - Loamy High Lime Till Plains |
er55d - Pre-Wisconsinan Drift Plains |
er55f - Whitewater Interlobate Area |
er56a - Lake Country |
er56b - Elkhart Till Plains |
er56c - Middle Tippecanoe Plains |
er56d - Michigan Lake Plain |
er57a - Maumee Lake Plains |
er71a - Crawford-Mammoth Cave Uplands |
er71b - Mitchell Plain |
er71c - Knobs-Norman Upland |
er71d - Outer Bluegrass |
er72a - Wabash-Ohio Bottomlands |
er72b - Glaciated Wabash Lowlands | er72b - Green River-Southern Wabash Lowlands |
er72h - Caseyville Hills | er72h - Wabash River Bluffs and Low Hills |