How Natural Processes Operate at Coastal Geographic Environment Essay

How Natural Processes Operate at coastal Geographic EnvironmentNatural Processes atomic number 18 actions or events that be in possession of inwrought causes, which result in innate(p) events. The three main coastal surroundings litigatees that operate at Muriwai are coastal Erosion, coastal Transportation and Coastal Deposition.The elements that interact to produce natural processes are wind, flutters and tides. Each phenomenon at Muriwais coastal geographic environment has been produced by interaction.Coastal Erosion is a process at Muriwai that gradually wears away the jolt particles of the earths surface, transporting them to another location. There are many types of processes that cause erosion at Muriwai such as wave erosion, wind erosion and wave refraction.Thou gumptions of years ago when sea levels dropped everyplace years at the Southern end of Muriwai, the aqueous rock and sandstone was receptive to the air. Rock from volcanic activity mixed with the sedimentar y rock this is called Breccia -- a mixture of all rock. An example of this is at Maori Bay. Coastal Erosion operates at different rates and different times. Limestone rock is eroded gradual than sedimentary rock. The cliff at Muriwai made of sedimentary rock was eroded bear out to expose Fishermans Rock - the shore platform which, made of limestone -- tended to erode back slower than the cliff.The types of wave erosion that caused this are - Hydraulic Action, when waves meet the cliff, air is coerce into cracks, and then as the wave retreats this air expands explosively. Over time the cracks enlarge, debilitative the base of the cliff causing erosion.Attrition is the breakdown of rock particles when they hit Otakamiro point and each other causing the base of the headland to erode. chemic Erosion/Corrosion occurs due to the content of limestone in the rockface of Otakamiro point. The seawater feature with the limestone produces a weak chemical solution, which erodes the base of the cliff and produces a confront effect.Chemical Weathering is when water weakens the structure of the rock and Mechanical Weathering is where water seeps into the rock face causing fragments of rock to break off. These types of erosion have caused the brass of several phenomena at Muriwai.Motutara Island (stack) was produced by the formation of two caves on every side of the headland -- forming an arch and the roof slowly erodin... ...ll build up the dunes and travel inland.Surface Creep occurs when landing sand particles remove the bigger and heavier particles, pushing them forward.Suspension is the picking up of sand by wind. This is when sand is airborne and then determineed anywhere.Coastal Deposition is the third main natural process occurring at Muriwais coastal geographic environment.It is the process of sediment be deposited to form natural features.This is when the rock fragments from Otakamiro Headland are ripped away by waves, broken down by attrition and transpor ted along the coast where they are deposited as beaches and sand dunes. The movement of the material is called Longshore Drift the direction of the deposit depends on the direction of the winds.Titomagnetite sand (black sand) was deposited at Muriwai when it was bought from the south by Longshore Drift.Coastal Erosion, Coastal Transportation and Coastal Deposition are natural processes that have occurred at Muriwais coastal geographic environment. These processes outlined have formed such phenomena as Motutara Island (stack), Otakamiro Point (headland/cliff), Fishermans Rock (shore-platform), cave and the blowhole.