Guide to Rocks and Minerals of Illinois

Illinois may be famous for its endless prairies, but beneath that flat landscape lies a surprisingly rich assortment of rocks and minerals. This guide walks listeners through the state's geologic story, from ancient marine sediments to the glacial deposits that reshaped the land during the Ice Age. The narration explains how surface outcrops, river valleys, and even the gravel left by retreating glaciers reveal a diverse collection of quartzite, limestone, sandstone, and even fragments of coal.

With clear descriptions and vivid examples, the book shows how each county hosts its own unique specimens, and offers tips for budding collectors and classroom projects. Listeners will come away with a deeper appreciation for the hidden complexity that makes the Prairie State a treasure trove for geology enthusiasts.