Major Land Resource Area 110X
Northern Illinois and Indiana Heavy Till Plain
Accessed: 11/21/2024
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Next, learn more about the selected ecological site and its characteristic dynamics by browsing the ecological site description and exploring alternative state and transition model formats.
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i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock <1.5m (60")
- Bedrock is limestone
- Light surface (ochric epipedon) or dark surface <15cm (6")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock <1.5m (60")
- Bedrock is sandstone
- Light surface (ochric epipedon) or dark surface <25cm (10")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock >1.5m (60")
- Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
- Light surface (ochric epipedon) or dark surface <15cm (6")
- Depth to seasonal high-water table >76cm (30")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock >1.5m (60")
- Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
- Light surface (ochric epipedon) or dark surface <15cm (6")
- Depth to seasonal high-water table 45-76cm (18-30")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Sands or coarse-textured outwash
- Light surface (ochric epipedon) or dark surface <15cm (6")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Depressions
- Lacustrine deposits, P-drained, restricted to Wisconsin
-
i
Key Characteristics
- River Valleys
- Flooded only
- Alluvium, depth to seasonal high-water table >45cm (18")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock <1.5m (60")
- Bedrock is limestone
- Dark surface (mollic epipedon) >25cm (10")
- Depth to seasonal high-water table >30cm (12")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock <1.5m (60")
- Bedrock is limestone
- Dark surface (mollic epipedon) >25cm (10")
- Depth to seasonal high-water table <30cm (12")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock <1.5m (60")
- Bedrock is sandstone
- Dark surface (mollic epipedon) >25cm (10")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock >1.5m (60")
- Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
- Dark surface (mollis epipedon) >25cm (10")
- Depth to seasonal high-water table >183cm (72")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock >1.5m (60")
- Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
- Dark surface (mollis epipedon) >25cm (10")
- Depth to seasonal high-water table 30-183cm (12-72")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock >1.5m (60")
- Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
- Dark surface (mollis epipedon) >25cm (10")
- Depth to seasonal high-water table <30cm (12")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock >1.5m (60")
- Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
- Dark surface (mollic intergrade) 15-25cm (6-10") or Inceptisols
- Depth to seasonal high-water table >183cm (72")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Bedrock >1.5m (60")
- Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
- Dark surface (mollic intergrade) 15-25cm (6-10") or Inceptisols
- Depth to seasonal high-water table 30-183cm (12-72")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Sands or coarse-textured outwash
- Dark surface (mollic epipedon) >25cm (10")
- Depth to seasonal high-water table >130cm (51")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Sands or coarse-textured outwash
- Dark surface (mollic epipedon) >25cm (10")
- Depth to seasonal high-water table 38-130cm (15-51")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Sands or coarse-textured outwash
- Dark surface (mollic epipedon) >25cm (10")
- Depth to seasonal high-water table <30cm (12")
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Gravelly glaciofluvial deposits
- Slopes <12 percent
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Gravelly glaciofluvial deposits
- Slopes 12-20 percent
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Summits, shoulders, and backslopes
- Gravelly glaciofluvial deposits
- Slopes >20 percent
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Depressions
- Organic soils, pH <4.5, restricted to Cook and Lake counties (IL) and Wisconsin
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Depressions
- Organic soils, pH 6.6+, restricted to Cook, DuPage, Kane, Lake, and McHenry counties (IL) and Wisconsin
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Depressions
- Organic material over sandy outwash, restricted to Kankakee Sand area
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Depressions
- Organic material over sandy outwash, restricted to Lake Michigan Dune area
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Depressions
- Organic and mineral soils, circumneutral, recharge wetland
-
i
Key Characteristics
- Uplands and high stream terraces (non-flooded)
- Depressions
- Mineral soils, calcareous surface, discharge wetland
-
i
Key Characteristics
- River Valleys
- Flooded and ponded
-
i
Key Characteristics
- River Valleys
- Flooded only
- Alluvium, depth to seasonal high-water table <15cm (6")
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Zoom in to display soil survey map units for an area of interest, and zoom out to display MLRAs. Select a map unit polygon to view ecological sites correlated to that map unit. View a brief description of an ecological site by clicking on its name in the map popup. Soil survey correlations may not be accurate, and ecological site classification of a location should always be verified in the field. Each selection may require the transfer of several hundred KB of data.
Ecological site keys
MLRA 110 Key to Ecological Sites
I.
Uplands and high stream terraces (non-flooded)
A.
Summits, shoulders, and backslopes
1
Bedrock <1.5m (60")
i.
Bedrock is limestone
a.
Dark surface (mollic epipedon) >25cm (10")
ii.
Bedrock is sandstone
2
Bedrock >1.5m (60")
i.
Loess (or other silty or loamy material), loamy glaciofluvial deposits, loamy outwsah, glacial till, lacustrine sediments
a.
Dark surface (mollis epipedon) >25cm (10")
1)
Depth to seasonal high-water table >183cm (72")
... R110XY006IL – Dry Glacial Drift Upland Prairie
2)
Depth to seasonal high-water table 30-183cm (12-72")
... R110XY007IL – Moist Glacial Drift Upland Prairie
3)
Depth to seasonal high-water table <30cm (12")
... R110XY008IL – Wet Glacial Drift Upland Prairie
b.
Dark surface (mollic intergrade) 15-25cm (6-10") or Inceptisols
1)
Depth to seasonal high-water table >183cm (72")
... R110XY009IL – Dry Glacial Drift Upland Savanna
2)
Depth to seasonal high-water table 30-183cm (12-72")
... R110XY010IL – Moist Glacial Drift Upland Savanna
c.
Light surface (ochric epipedon) or dark surface <15cm (6")
2)
Depth to seasonal high-water table 45-76cm (18-30")
... F110XY012IL – Moist Glacial Drift Upland Forest
3
Sands or coarse-textured outwash
i.
Dark surface (mollic epipedon) >25cm (10")
4
Gravelly glaciofluvial deposits
B.
Depressions
1
Organic soils, pH <4.5, restricted to Cook and Lake counties (IL) and Wisconsin
... R110XY020IL – Ponded Organic Acidic Peatland
2
Organic soils, pH 6.6+, restricted to Cook, DuPage, Kane, Lake, and McHenry counties (IL) and Wisconsin
... R110XY021IL – Ponded Organic Alkaline Peatland
3
Organic material over sandy outwash, restricted to Kankakee Sand area
... R110XY022IL – Organic Sand Seep
4
Organic material over sandy outwash, restricted to Lake Michigan Dune area
... R110XY023IL – Organic Interdunal Fen
5
Organic and mineral soils, circumneutral, recharge wetland
... R110XY024IL – Ponded Depressional Sedge Meadow
6
Mineral soils, calcareous surface, discharge wetland
... R110XY025IL – Ponded Calcareous Sedge Meadow
II.
River Valleys
B.
Flooded only
1
Alluvium, depth to seasonal high-water table >45cm (18")
... F110XY028IL – Silty-Loamy Floodplain Forest
2
Alluvium, depth to seasonal high-water table <15cm (6")
... R110XY029IL – Wet Floodplain Sedge Meadow
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The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
