National Geologic Map Database
General Information
- Title: Middle and Late Ordovician lithostratigraphy and biostratigraphy of the upper Mississippi Valley
- Author(s): Sloan, R.E.
- Publishing Organization: Minnesota Geological Survey
- Series and Number: Report of Investigations 35
- Publication Date: 1987
- Cross Section: Yes
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Geologic units referred to in Geolex
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