Pre-Wisconsinan Drift Plains Ecoregion
Ecoregions: Pre-Wisconsinan Drift Plains
Pre-Wisconsinan Drift Plains Ecoregion shown in Tan
The Pre-Wisconsinan Drift Plains ecoregion is different from surrounding ecoregions because it contains deeply-leached, acidic, pre-Wisconsinan till and thin loess (fine, wind-deposited material). The Wisconsinan glaciation occurred between 75,000 and 110,000 years ago, so these are very old soils. There are also widespread areas of nearly flat, very poorly-drained soils with fragipans (dense soil layers that restrict water infiltration and root penetration). Now largely agricultural, the area was once dominated by beech forests and elm-ash swamp forests. Streams in this ecoregion tend to be faster-moving and more biodiverse than those in the High Lime Till Plains. Source: US EPA
Natural Areas in this ecoregion include:
Calli Nature Preserve (Jennings County)
Chelsea Flatwoods (Jefferson County)
Deam Lake State Recreation Area (Clark County)
Guthrie Woods (Jennings County)
Muscatatuck National Wildlife Refuge (Jennings County)
Nine Penny Branch Nature Preserve (Clark County)
Pennywort Cliffs (Clark County)
Starve Hollow State Recreation Area (Jackson County)
Tribbetts Flatwoods Nature Preserve (Jennings County)
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