National Geologic Map Database
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                Title: The Chester series in Illinois [part 2 of 2]
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                Author(s): Weller, Stuart
            
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                    Publishing Organization: University of Chicago Press
            
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                Series and Number: Journal of Geology v. 28, no. 5 [p. 395-416]
            
- Publication Date: 1920
- Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.