Description:This volume features field guides and descriptions of eight of the geological field trips offered during the Joint Meeting of the Geological Society of America Northeastern and North-Central Sections held in Pittsburgh, Pennsylvania, in March 2011. From glaciers to gristmills, shales to slides, these timely and topical trips highlight the region's geology from eastern Ohio to the Central Appalachian Valley and Ridge and show how it has shaped the region-topographically, structurally, historically, industrially, and evolutionarily.