The Appalachian Orogeny refers to a series of geological events that formed the Appalachian Mountains in eastern North America. This mountain-building process began over 480 million years ago and involved the collision of tectonic plates, which caused the land to fold, uplift, and erode over time. The orogeny is divided into several phases, including the Taconic, Acadian, and Alleghenian orogenies. These events contributed to the complex geology of the region, resulting in diverse rock formations and landscapes that are still visible today. The Appalachian Mountains are now a significant natural feature and a vital part of the ecosystem.