Please enable JavaScript.
Coggle requires JavaScript to display documents.
2.a - Coastal landforms develop due to a variety of interconnected…
2.a - Coastal landforms develop due to a variety of interconnected climatic and geomorphic processes.
geomorphic processes
weathering
-
physical
produces smaller fragments of the same rock, increases exposes surface area allowing further weathering to take place
-
-
-
chemical
decay of rocl, involves chemical reactions between moisture and some minerals within the rock
-
-
-
biological
physicao actions such as the growth of plant roots or chemical processes such as chealation by organic acids
mass movement
occurs when the forces acting on slope material, predominantly gravity, exceed the forces tyring to keep material on the slope, friction
rock fall
on cliffs of 40deg or more, especially if the cliff face is bare, rocks may become detached from the slope by physical weathering processes. these then fall to the foot of the cliff under gravity
slides
slides often occur due to undercutting by wave erosion at the base of the cliff. common in weak rocks, such as clay, which also become heavier when wet.
wave processes
-
erosion
-
-
attrition - when rocknparticles collide with eachother and with coastal rocks and progressively become worn away. they become smoother and more rounded as well as smaller
-
hydraulic action - when waves break against a cliff face, air and water is forced into cracks in the cliff face, and the pressure and energy from waves makes these cracks bigger
-
deposition
material is deposited where there is a loss of enerfy caused by a decrease in velocity and or volume of water
occurs when
-
-
in low energy environents, such as those sheltered from winds and waves
fluvial processes
in coastal environments such as river mouths, fluvial processes often play an important part in the development of landforms
erosion
fluvial erosion in the upper catchment is the main source of a rivers sediment load. rivers use similar erosional procesesses to waves.
-
-
-
-