Some of the constructive forces that shape and create landforms are crustal deformation, deposition of sediment and volcanic eruptions. The flow of heat through the Earth's crust and the movement of tectonic plates and magma account for some of the more spectacular crustal deformations. The transportation, or deposition, of sedimentary particles by wind, water and glaciers results in the creation of dunes, deltas and other topographical features.Continue Reading
The variety of movements taking place within the outermost portion of the Earth's crust, or lithosphere, are collectively referred to as plate tectonics. These movements represent massive constructive forces that have created major mountain ranges across the world. Depending upon the manner in which they are defined, there are either seven or eight major tectonic plates and several minor plates in the lithosphere. These plates slide over the layer beneath the Earth's crust, which is called the mantle. This movement is driven by convection, which is the process of heat transfer taking place within the Earth.
The manner in which the tectonic plates move in relation to each other determines the type of constructive force exerted on the Earth's crust and its resultant deformation. The three types of plate movement are convergent, divergent and transform. A convergent motion means the plates are moving toward each other, which often results in the formation of mountains. When two plates move away from each other, it represents a divergent motion, while the movement of plates sliding past each other represents a transform motion.Learn more about Landforms
Landforms are divided into 11 major categories: Aeolian, coastal and oceanic, erosion, fluvial, impact, karst, lacustrine, mountain and glacial, slope, tectonic and volcanic. Within these groupings are many landform subtypes.Full Answer >
Geologists consider the four major landforms to be hills, mountains, plains and plateaus. Other minor categories of landforms include, but are not limited to, canyons, valleys, buttes, basins, bays and peninsulas.Full Answer >
Landforms are formed by movements of the earth, such as earthquakes, weathering, erosions and deposits. Many landforms are created by more than one of these processes. These are called polygenetic landforms.Full Answer >
Delta landforms are sedimentary wetlands that form at the mouths of rivers where the velocity of the water slows. As the sediment builds, triangular landforms separate the river into two or more channels.Full Answer >