In this odd and spectacular north country, contorted rocks reveal the strain of colliding continents, the heat of molten intrusions, and the weight of relentless glaciers, From the swarm of dikes along the rugged coast to the glacially polished granite of Mt. Katahdin, this book explores the fascinating geologic history of Maine's storied rocks. Detailed maps and roadlogs guide you through the woods to such hidden wonders as 100-mile-long eskers, frozen patterned ground, tourmaline-rich pegmatites, pillow basalts, and ice-age delta mud.