National Geologic Map Database
General Information
- Title: Rock stratigraphy of the Silurian System in northeastern and northwestern Illinois
- Author(s): Willman, H.B.
- Publishing Organization: Illinois State Geological Survey
- Series and Number: Circular 479
- Publication Date: 1973
- Map Scale: 1:871,927
- Cross Section: Yes
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Additional Resources
- Links and Downloads:
- Publication
- This product is available, please note the publication series and number, and then contact:
- Illinois State Geological Survey
- Sales/Information Office
- ISGS
- 615 E. Peabody Drive
- Champaign, IL 61820-6964
- Phone: (217) 244-2414
- Email: sales@prairie.illinois.edu
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.