2026 HYDRIC SOILS - Part 2

This page contains links to resources for participants of the 2026 Hydric Soils for Wetland Determinations - Part 2 Course. Disclaimer: Documents developed by the Illinois Soil Classifiers Association and other documents presented here, are from published and/or unpublished sources. Any recommendations contained herein are informational and may become dated as new research and information is developed. By acting upon, or otherwise utilizing any of this information, the user takes responsibility for any outcome and agrees to not hold ISCA, including its officers and committees, liable.

ISCA Presents - Hydric Soils for Wetland Delineation - Part 2

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2026 Class Presentations

ISCA Hydric Soil Field Trips & Seminars

Muck over marl - 2023
After discussing this site and doing a bit of research, we concluded that the whitish layer is marl (Lma horizon) formed by near-shore lakebed sediments from a past environment. The marl was also enhanced by the accumulation of secondary carbonates which were discharged in the calcium-rich groundwater through the stratified soils. Marl is a kind of limnic material (freshwater lake sediment) that is high in calcium carbonate and generally feels chalky or silty.

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