Bajadas: Bajadas are gently sloping surfaces formed by the coalescence of alluvial fans. They are typically found in arid and semi-arid regions where there is little vegetation to hold the sediments in place.
Playas: Playas are flat, dry lake beds that form in arid regions. They are typically covered with a layer of fine-grained sediment and are often surrounded by sand dunes.
Canyons: Canyons are deep, narrow valleys with steep sides. They are typically formed by the erosive action of rivers and streams over long periods of time.
Mesas: Mesas are flat-topped mountains with steep sides. They are typically formed by the erosion of a plateau, leaving behind a resistant cap rock.
Buttes: Buttes are isolated, hill-like features with steep sides. They are typically formed by the erosion of a mesa or plateau, leaving behind a remnant of the original landform.
Arches: Arches are natural bridges formed by the erosion of rock. They are typically found in areas with soft, easily erodible rock, such as sandstone.
Natural bridges: Natural bridges are similar to arches, but they are formed by the erosion of rock beneath a stream or river.
Hoodoos: Hoodoos are tall, thin spires of rock that are formed by the erosion of soft rock, such as sandstone or limestone.
Karsts: Karsts are landscapes that are characterized by sinkholes, caves, and underground rivers. They are formed by the erosion of soluble rock, such as limestone or dolomite.
