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Holocene Series- Modern Soil
- Cahokia Alluvium
- Grayslake Peat
- Parkland Sand
- Lacon Formation
- Peyton Colluvium
- Lake Michigan Formation
- Ravinia Sand Member
- Waukegan Member
- Lake Forest Member
- Winnetka Member
- Sheboygan Member
- Wilmette Bed
- South Haven Member
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