Author Scott Spoolman has picked 52 of the best geologic sites in the state to include in Wisconsin Rocks , a new title in the state-by-state Geology Rocks series. Organized into five regions of the state, all of the sites are in publically accessible parks and natural areas. Outdoor enthusiasts will enjoy learning about the rock formations of the state's many glens, gorges, and bluffs. Geology buffs can also explore glacial features along Wisconsin's 1,200-mile-long Ice Age Trail or avoid them altogether in the Driftless Area, a region mysteriously untouched by the massive ice sheets of the Pleistocene Epoch.