Earth’s surface can be grouped into eight basic landform types: mountains, valleys, plateaus, deserts, plains, canyons, basins and islands.
Mountains
Mountains rise sharply above surrounding terrain and are produced by several tectonic processes. Fold mountains result from colliding plates that wrinkle rock layers into arches, as seen in the Himalayas. Fault‑block mountains form when crustal blocks tilt along faults, exemplified by the Sierra Nevada. Volcanic mountains build up from repeated eruptions, such as Mount Fuji. Each type creates distinct habitats and influences regional climate.
Valleys
Valleys are elongated depressions between higher ground. Rivers cut V‑shaped valleys by downward erosion, while glaciers carve U‑shaped valleys with steep walls and flat floors. Fertile river valleys have supported human settlement for millennia, and valleys also serve as wildlife corridors.
Plateaus
Plateaus are extensive, elevated flatlands. They arise from tectonic uplift (intermontane plateaus like the Tibetan Plateau), broad continental uplift (the Colorado Plateau), or massive lava flows that solidify into basaltic tablelands (the Columbia River Plateau). Their height creates cooler, often drier climates.
Deserts
Deserts are regions receiving less than about 250 mm of precipitation per year. They form in rain shadows behind mountains, at high latitudes, or where cold ocean currents suppress evaporation. Despite harsh conditions, deserts host specially adapted plants and animals.
Plains
Plains are broad, relatively flat areas with gentle slopes. They develop from sediment deposition by rivers, wind, or glacial melt, creating fertile soils that support agriculture. The Great Plains of North America illustrate a classic interior plain.
Canyons
Canyons are deep, narrow valleys with steep sides, usually cut by persistent river erosion. The Grand Canyon showcases how a river can incise through rock layers over millions of years, exposing geological history.
Basins
Basins are low‑lying depressions that may collect water, sediments, or both. Some are endorheic, holding water that never reaches the sea, like the Caspian Sea basin. Others serve as sediment traps for surrounding highlands.
Islands
Islands are land masses completely surrounded by water. They can be volcanic (Hawaii), continental fragments (Great Britain) or formed from coral reef buildup (Maldives). Their isolation often leads to unique ecosystems.