- Usage in publication:
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- Westfield Drift
- Modifications:
-
- Named
- Dominant lithology:
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- Till
- AAPG geologic province:
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- Illinois basin
Summary:
The only formal morphostratigraphic units recognized in IL are units related to moraines that are called "drifts." Is named for Westfield, Clark Co, IL (Illinois basin); is based on the Westfield Moraine (mapped on pl. 1), which is the outer of the three moraines in the Shelbyville Morainic System. The moraine is 1 to 2 mi wide, 40 mi long, and its crest is about 100 ft above the Illinoian till plain. Deposited by the Decatur Sublobe of the Erie Lobe. Assigned to Woodfordian Substage of Wisconsinan Stage in Pleistocene Series.
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 ([ ]).