- Usage in publication:
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- Haldane Bentonite Bed
- Modifications:
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- Original reference
- Dominant lithology:
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- Bentonite
- AAPG geologic province:
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- Wisconsin arch
Summary:
Pg. 50. Haldane Bentonite Bed of Loves Park Member of Dunleith Formation (in Illinois), and Haldane Bentonite Bed of Wall Member of Dunleith Formation (Galena area). Present in Illinois. Consists of bentonite clay, 0.05 m thick. Bed marked by strong reentrant in exposures. At type section, overlies and underlies dolomite units in upper part of Loves Park member. To the west, in Galena, Illinois, area, is in middle part of Wall Member. Age is Middle Ordovician.
Type section: Victory School Section, abandoned quarry on west side of Pine Creek, north of Victory School, 3.2 km southwest of Mt. Morris, in NW/4 SW/4 SE/4 sec. 32, T. 24 N., R. 9 E., Ogle Co., IL. Named from town of Haldane, 8 km northwest of type section.
Source: US geologic names lexicon (USGS Bull. 1564, p. 70).
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 ([ ]).