- Usage in publication:
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- Radnor Till Member
- Modifications:
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- Named
- Dominant lithology:
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- Till
- AAPG geologic province:
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- Illinois basin
Summary:
Named as member of Glasford Formation (new) for Radnor Township, Peoria Co, IL. Type section is roadcut exposure described in Jubilee College Section, SW SW SW sec 7, T10N, R7E. In the type section, is bounded at top by the top of the Sangamon Soil. Is overlain by Roxana Silt, and it rests on the Toulon Member (new) of the Glasford. Till is gray, compact, silty, and high in illite content. Geographic distribution in west-central IL is shown on fig 6 (Illinois basin). Spatial relations shown in fig 7. Composition summarized in tables 2, 4, and 5. May be a stratigraphic equivalent of the Sterling Till Member of northern IL, but is geographically separated from it by the Green River Lobe. Is in the Jubileean Substage of the Illinoian Stage. It was deposited by the Lake Michigan Lobe.
Source: GNU records (USGS DDS-6; Denver GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).