The Appalachian Mountains were formed when colliding tectonic plates folded and upthrusted, mainly during the Permian Period and again in the Cretaceous Period. The folds and thrusts were then eroded and carved by wind, ... More »

The Appalachian Mountains extend from central Alabama around 1,500 miles north to Canada. Mt. Mitchell, located in North Carolina and rising 6,684 feet, is the highest point in the Appalachians. More »

The Appalachian Ridge and Great Appalachian Valley are geologic formations created between 300 and 400 million years ago. In multiple collisions, the tectonic plates containing North America and Africa came together in t... More »

The consensus among scientists is that the Appalachian Mountains are the oldest mountains in the world. However, there is not absolute certainty. More »

According to About.com, the Earth creates mountains through plate tectonics, where its crust is broken into plates constantly in motion, causing stress and uplifting in order to grow mountains. While growth is slow due t... More »

The Andes are a large volcanic chain of mountains that run the length of the west coast of South America along the boundary between the South American and Nazca plates. The gradual subduction of the Nazca plate beneath t... More »

The landforms of North America are diverse and include the Appalachian Mountains, Canadian Shield, Great Plains and Sierra Madres, plus many river valleys, rolling hills and high bluffs. These landforms help make up the ... More »