This second edition of The Geological Map of Illinois presents a concise view of the state’s formations, the data behind them, and how geologists interpret the land’s history. It’s designed as a practical base for study, policy, and resource planning, with updates aimed at improving accuracy over time.

The text explains how a geological map is created, what “forms” and boundaries mean, and how suppliers of data shape the map you see. It also notes the map’s limits, emphasizes the value of continued field work, and describes how coal, oil, gas, and mineral resources relate to Illinois’ rocks. The volume blends maps, explanatory text, and cross‑references to help readers understand major rock groups, from Silurian to Pleistocene, and the role of glacial deposits in shaping today’s surface.

See how the map was built from Worthen’s and Leverett’s work, plus new field observations
Learn about the main rock groups and where they appear in Illinois
Understand how resources like coal, oil pools, and minerals relate to geology
Appreciate the challenges of mapping under drift and changing formations

Ideal for students, teachers, and anyone curious about how a state’s geology informs its natural resources and history.

"About this title" may belong to another edition of this title.

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