Major Land Resource Area 116C
St. Francois Knobs and Basins
Accessed: 10/07/2024
Description
The St. Francois Knobs and Basins is the structural center of the Ozark Dome. Elevation ranges from about 450 feet along the rivers in the southern part of the area, to 1,772 feet on the summit of Taum Sauk Mountain, the highest point in Missouri. Prominent features of this MLRA are the Precambrian igneous knobs and hills that rise conspicuously to various elevations, interspersed with smooth-floored basins and valleys overlying dolomite and sandstone. Ecological Sites defined for this MLRA are commonly associated with igneous parent materials, either in knob or basin positions.
Key publications
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1
Select an ecological site
Select an ecological site using the list, keys, photos, briefcase, or quick search option located on this page. -
2
Explore the ecological site description
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.
Ecological site list
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i
Key Characteristics
- Colluvium and/or Residuum
- Bedrock >20"
- Slopes <15%
- IGNEOUS UPLAND WOODLAND Bedrock >40"
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i
Key Characteristics
- Colluvium and/or Residuum
- Bedrock >20"
- Slopes <15%
- DRY IGNEOUS UPLAND WOODLAND Bedrock 20-40"
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i
Key Characteristics
- Colluvium and/or Residuum
- Bedrock >20"
- Slopes >15%
- Bedrock >40"
- IGNEOUS PROTECTED BACKSLOPE FOREST N, E aspects
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i
Key Characteristics
- Colluvium and/or Residuum
- Bedrock >20"
- Slopes >15%
- Bedrock 20-40"
- DRY IGNEOUS PROTECTED BACKSLOPE WOODLAND N, E aspects
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i
Key Characteristics
- Loess over Residuum
- CLAYPAN BASIN FLATWOODS Claypan
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Key Characteristics
- Loess over Residuum
- FRAGIPAN BASIN WOODLAND Fragipan
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Key Characteristics
- Colluvium and/or Residuum
- Bedrock >20"
- Slopes >15%
- Bedrock >40"
- IGNEOUS EXPOSED BACKSLOPE WOODLAND S, W aspects
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i
Key Characteristics
- Colluvium and/or Residuum
- Bedrock >20"
- Slopes >15%
- Bedrock 20-40"
- DRY IGNEOUS EXPOSED BACKSLOPE WOODLAND
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i
Key Characteristics
- Colluvium and/or Residuum
- SHALLOW IGNEOUS KNOB GLADE Bedrock <20"
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