• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Gradation Processes

Extracts from this document...

Introduction

Gradational Processes Introduction Gradation is a process whereby the surface of the land is reduced to an even plain known as grade, higher areas are worn down and depressions are filled. Coastal areas are a great example of the process known as gradation. Our study site Lowlands is a beach located on the south western coast of Australia about 30kms or half and hours drive from Albany. Lowlands beach is an example of the most common coastal landscape, the cliffed coastline of headlands and bays. Erosional Landforms The most predominant erosional coastal landforms at lowlands beach are the bays, headlands, wave cut platforms, blowholes and natural arches, and sea cliffs. Each landform has been shaped due to different erosional processes. Bays are the result of less resistant sections of coastline eroding at a faster rate than others. Destructive waves and wave transportation is the main cause of this landform. The extent of erosion depends on the effectiveness of waves transporting away the weathered material. Headlands are predominantly sections of resistant strata within the coastal zone. They may be the result of igneous intrusions that have been exposed as the surrounding rock has been eroded. ...read more.

Middle

Split offshore bars are created when the tide retreats water is funnelled through the gaps that are deepened and widened by abrasion and hydraulic action. Over time the rip currents will decrease in strength as the gap becomes wider and deeper. Weathering Landforms Lowlands beach also has many weathered coastal landforms like caves, pitted or honey combed rock, beachrocks, pinnacles or lapies, and notches. Caves and Pitted or honey combed rock are formed due to sea spray weathering and salt crystal growth. Wind carries salt spray onto rocks where it is absorbed into small pores and cracks within the rocks. There the water evaporates and the salt crystallises, creating pressure and often breaking down the rock. Also at lowland we found evidence of calcium carbonate binding together with other sediments to form beachrock. Pinnacles or lapies are created due to the salt water solution containing carbon dioxide or carbonic acid easily dissolving limestone along the beach. As the limestone rocks are dissolved they leave a network of ridges and pinnacles along the beach which are often very sharp; refer to the eroded boulders in Figure 3. Notches can be formed from many different sources one being the action of marine organisms. ...read more.

Conclusion

But humans take some responsibility by putting signs and bins in place to protect them and the natural environment from further erosion; shown in Figure 4. But not all signs are followed and can lead to death or erosion of the natural landscape. Some other land uses can greatly affect the land. Powerlines could devastate the Lowlands area if they faulted and started a fire on a windy day. Other land uses like fishing could also devastate local fish populations if fishermen don't abide by the fisheries laws and bag limits. Conclusion Lowlands beach is a coastal landscape with coastal landforms created mainly by gradational forces. Processes like marine erosion, deposition, transportation, weathering, and mass movement all contribute to this coastal landscape and its landforms. But influences and land use conflict by human impact also affects how this coastal landscape looks and what you will find within it. If humans can minimize their negative impact, this landscape can be kept sustainable and safe for human activities and animal life. Resources * Coastal Systems field study booklet * Coastal landscapes handout * Weathering handout * The work of waves handout * Human impact on coastal landscapes handout * Field study pictures * Focus questions * http://en.wikipedia.org/wiki/Coastal_geography * http://www.physicalgeography.net/fundamentals/10s.html * http://www.aabarrett.co.uk/coasts/cindex.htm ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Coastal Landforms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Coastal Landforms essays

  1. "An investigation into the methods of coastal management along Brighton's Coastline and the reasons ...

    First the sand was quite deep and it increases even though then there was a minor decline but then it keeps on escalating. For example at 10 metres the sand was 158 centimetres deep until that point it kept on increasing but then at 15 metres it declined to 100 centimetres and at long last it increased again.

  2. Coastal Landforms - How Geology controls coastal features in the Swanage Area?

    An example can be seen opposite. What happens in mass movement is that you get clay, which is generally impermeable and if you get a porous layer on top of the clay such as limestone then water will percolate through the limestone into the clay and due to the weight of the water and the water

  1. Investigate the effects of costal processes on Porlock Bay in Somerset and also to ...

    This will happen because the pebbles will be eroded, as fragments will break as the pebbles move further east. I think there will be very angular pebbles at Gore Point. Size of the pebbles I predict that the size of the pebbles will be smallest on the east side of the bay.

  2. How and Why ChristChurch Bay is Manged

    this tells how the team which looks after Christchurch Bay how they try to maintained the sites Coastal management sustainability Secondary data Barton on sea has the most attention of management than the other 2 sites.

  1. Is it the physical landscape that attracts tourists to Swanage and Studland?"

    So in conclusion my question is right as more tourists are attracted to Swanage / Studland for the physical landscape. Within this coursework I have described the methods we used, within this section I will say the problems we came across and how we could have improved them and how

  2. Herne Bay is situated along the stretch of the North Kent coast in Southeast. ...

    Are there features made by people which spoil it? Blend with the environment 0 points deducted Have little negative impact 1 point deducted Have a strong negative impact 2 points deducted Pollute the environment 3 points deducted Deductions Final Score Location 2 Yacht Club Wave Measurements Frequency (per min)

  1. Coastal Processes

    Page 29 * Photo of working groups --------------------------------------. Page 29 * Pebble length results -----------------------------------------. Page 30 * Pebble length results analysis -------------------------------- Page 30 * Pebble shape results ------------------------------------------ Page 30 * Pebble shape results analysis --------------------------------- Page 30 * Results graph -------------------------------------------------- Page 31 * Average results sheet ----------------------------------------.

  2. Free essay

    To what extent do you agree with the view that coastal systems are too ...

    being the most common for settled areas ( with 17 out of 63 sub cells in this area). The characteristics for this stretch of coastline are that there are shale and sandstone cliffs in the north, and chalk cliffs in the south at Flamborough head, these soft rocks mean that

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work