How Natural Processes Operate at Coastal Geographic Environment Essay

How Natural Processes bunk at coastal Geographic EnvironmentNatural Processes argon actions or events that seduce natural causes, which result in natural events. The three of import coastal environment performancees that operate at Muriwai argon coastal wearing, Coastal Transportation and Coastal Deposition.The elements that interact to produce natural processes are wind, waves and tides. for each one phenomenon at Muriwais coastal geographic environment has been produced by interaction.Coastal Erosion is a process at Muriwai that gradually wears away the leaning particles of the earths surface, transporting them to other location. There are many types of processes that cause corrosion at Muriwai much(prenominal) as wave erosion, wind erosion and wave refraction.Thou keystones of years agone when sea levels dropped over years at the Southern end of Muriwai, the aqueous rock and anchorstone was exposed to the air. Rock from volcanic activity mixed with the aqueous 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 gnawd slower than sedimentary rock. The drop cloth at Muriwai made of sedimentary rock was eroded back 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 send off the cliff, air is forced into cracks, and then as the wave retreats this air expands explosively. oer time the cracks enlarge, weakening the behind of the cliff causing erosion.Attrition is the dislocation of rock particles when they hit Otakamiro point and each other causing the base of the headland to erode.Chemical Erosion/Corrosion occurs due to the content of limestone in the rockface of Otakamiro point. The seawater combined with the limestone produces a weak chemical solution, which erodes the base of the cl iff and produces a pitted effect.Chemical Weathering is when water weakens the structure of the rock and robotlike Weathering is where water seeps into the rock face causing fragments of rock to break off. These types of erosion have caused the formation of several phenomena at Muriwai.Motutara Island (stack) was produced by the formation of dickens caves on either side of the headland -- forming an arch and the roof soft erodin... ...ll build up the dunes and travel inland.Surface Creep occurs when landing sand particles remove the larger and heavier particles, pushing them forward.Suspension is the picking up of sand by wind. This is when sand is airborne and then deposited anywhere.Coastal Deposition is the 3rd main natural process occurring at Muriwais coastal geographic environment.It is the process of sediment being deposited to form natural features.This is when the rock fragments from Otakamiro Headland are ripped away by waves, broken down by attrition and transported on the coast where they are deposited as beaches and sand dunes. The movement of the material is called Longshore swash 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 confederation 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.