Modern Soil

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Lithostratigraphy: Modern Soil
Chronostratigraphy: Cenozoic Erathem >>Quaternary System >>Holocene Series

Primary source

Willman, H. B., and John C. Frye, 1970, Pleistocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p.

Contributing author(s)

H. B. Willman and John C. Frye


Original description


Other names


This unit has long been called "Modern Soil," and it seems undesirable to replace it with a geographic name.

Type section

Type location

As a stratigraphic entity the type section is designated units 4-8 of the Buda East Section (Frye, Glass, and Willman, 1968, p. 20), SE SE SW Sec. 31, T. 16 N., R. 8 E., Bureau County.

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

In a stratigraphic sequence it is overlain only by man-made deposits.

Extent and thickness

The soil ranges from very shallow to many feet in depth and is developed in any sediment that may underlie the present surface.


The term Modern Soil is applied to any soil profile genetically related to the modern topographic surface.

The Modern Soil is the soil described in the many county soil reports of the University of Illinois Agricultural Experiment Station and of the U. S. Department of Agriculture Soil Conservation Service.




Well log characteristics


Age and correlation

Environments of deposition

Economic importance




FRYE, J. C, H. D. GLASS, and H. B. WILLMAN, 1968, Mineral zonation of Woodfordian loesses of Illinois: Illinois State Geological Survey Circular 427, 44 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation