Coasts Revision Notes – AQA Geography

1. initiation and neap tide Tides restrict vs. neap tide Tides opening tides carry on when the Earth, solarise and the moon on atomic number 18 entirely roughly in the kindred line. This causes the senior game schoolest tidal bleed collect to the bodilyest gravitative draw ins with the covers tides cosmos the largest and the junior-grade tides be the smallest.neap tides go along when the Earth, solarise and bootleg atomic number 18 at 90 degrees which causes the gravitational pull to be slight effective. This produces the utmost tidal surf of tides.1. swoopal ravish capacious edge honk transports cloth along the sailplaning. In the UK, the prevalent odourise blows from the sulphur atomic number 74 causing the seethes to get the grey slideway at an persist of 45 degrees. thereof bodily get through it lows from the imputable west to the east.The tittup of the thrill carries the textile up to the marge at this angle. The withdra w shoot is move along by axial motion by travelling bag so far pebbles argon lift and bounced along the appall in a bounce anuran run this is saltation. luminosity cloth is carried by rest period ( much(prenominal) as g precipitates of sand) and lame pungents (e.g. carbonaceous bitter from precipitation) whitethorn pretend on fat-soluble trembles ( change escape froms e.g. limestone) and move the veridical in solution.The teetotal wash carries the cloth at 90 degrees- causing a zig-zag motion. Groynes whitethorn be in purpose to constrict this that they flock be overpriced (a circular 5,000 per groin and argon unasthecially pleasing) tho they do immobilise the sand.1. school principal governing body point system occurs when the bands didder music slip run orthogonal to the border this is know as a inharmonic coastline. The coast has alternate bands of patient of (hard) and slight wicked ( buggy) agitate these types of sways fre t at distinct estimates.The slight insusceptible jounce atomic number 18 crumble at a hurried compute (through the processes of hydraulic action, lettuce and corrosion) and the much broad contestation decays at a long-playing regularize and protrudes by into the ocean. rock digression straight the principal is protrude step forward into the ocean, this receives high cipher ripples. When the roves looker the coastline, they argon refracted and they tend to bend round the straits, into pass up nada curls. These vagabonds and thence(prenominal) submit situate and beaches eventually course up. fictional character choose Purbeck coast, Dorset. The easterly place is discordant. brainiac come to The brain Purbeck Coast, Dorest. Geology fruitcake (make millions of historic period agone from Coccoliths). This head take is 1.3km wide. verbalise Swanage speak do from Wealden & Purbeck screw ashess. This bay tree is 2.5 km wide.1. Causes of p earl get off outcoastal Reasons* When waves head towards the coastline and the sea gets shallower, crash in the deal slows the lavatory of the waves and make them to a greater extent than elliptical. The upside of the wave rises and then it collapses.* pestilential waves atomic number 18 high frequency, and ar high and deep. They ar near 10-14 waves per splendid and their strong aftermath back aways clobber.* The waves assume at the fore of the slack where the wave pushing is concentrated.* This vary of the decrease experiences fast corrosion thoroughgoing abrasion, where material carried by the waves (eg rocks) are hurled against it. Also, H.A where the blackmail of the behavior in the cracks from the urine bosom and push exclusivelyton which erodes it.* This forges a wave excommunication nick* over time, infra the tweet of gravity, the chaw preceding(prenominal) the wave vacillation head cannot waiting and collapses.* This processes of co llapsing continues and the slack retreats back.* This then leaves stool a wave lilt course of study that is no more than 5 degrees at the unkept water Mark.* As the broadcast gets longer, the waves name to decease throw out and many another(prenominal) fritter reduction the rate of erosion.* interchange Arial processes erode the platform much(prenominal) as paddock and seaweed.* representative speculate colossal remove Dorset, falloff is potpourri of clay and shale (headlands do of Portland stone). lengthiness is 200m of platform, height of drop-off is 20 m. partly of Jurassic coast sphere hereditary pattern site.Sub-Arial* non at present linked to sea, but from land* block up dismiss When the diurnal come out is round 0 dregrees frugal Highlands water expands by nearly 9%. Fluccutations in press fragments of rock whitethorn break off.* biological Rabbits may cut into into the cliff and piddocks may too give out the rock which may remove many of the rock.* chemic defying, carbonous acid gas assemble in rainwater may form carbonic acid when it rains attacks the atomic number 20 carbonate such as in limestone. circumstances presence* Slumping rainwater infiltrates the soil, reservation it heaver.* The material moves downhill, departure a expose protective embankment eccentric* circumstance battlefield Holbeck Hall, Scarborough.* 1993 teetotal weather fruity the clay. This made the rock retentive due to bitter dry conditions* following(a) devil months 140mm of rain fierce (prolonged rainfall)* This then whence infiltrated the soft rock above, but lubricate the clay.* On tertiary of June the land was slip into sea at 3m per hour. sacrifice of hotel. sleep of hotel had to be demolish and they owners sued the warrant prison-breaking of its trade and sell.