- Usage in publication:
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- Alburnett Formation
- Modifications:
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- Original reference
- Dominant lithology:
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- Till
- AAPG geologic province:
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- Iowa shelf
Summary:
Alburnett Formation. Consists mostly of till, fluvial sediments, paleosols; color is mostly yellowish-brown to dark-gray. Loam-textured till is high in expandable clays, kaolinite, and illite. Divided into several till units separated by silt, sand, and gravel, organic material and paleosols. Thickness 10 m at type section; ranges from <1 to 76 m. Unconformably overlies Paleozoic bedrock; unconformably underlies Wolf Creek Formation. Age is Pleistocene (pre-Illinoian).
Type section: Little Paha core section, in roadcut through center of small paha near town of Alburnett, in NW/4 NW/4 SW/4 SW/4 sec. 17, T. 85 N., R. 7 W., Linn Co., east-central IA.
Source: US geologic names lexicon (USGS Bull. 1564, p. 3).
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 ([ ]).