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

batemans bay field report

Extracts from this document...


jkhgGeography Weighting: 30% Mr Brown Field work report Due: 5/4/07 By Vinny Shankar The following report was conducted using information gathered from various geological locations on the South coast of N.S.W including Bingi point, Broulee, Guerrilla bay, Bateman's bay area, South Durras area and Wasp head on Monday March 26-27 2007. The erosional and depositional features and processes caused along the coastline were observed and analysed. Erosional features and Processes The main types of Erosional processes are: * Hydraulic action * Corrasion * Attrition In addition there are many forms of weathering. * Salt weathering * Honeycomb weathering * biotic weathering Hydraulic action: This is when water (generally from powerful waves) rushes into cracks in the rockface rapidly. This traps a layer of air at the bottom of the crack, compressing it and weakening the rock. When the wave retreats, the trapped air is suddenly released with explosive force. The explosive release of highly pressurised air cracks away nbhfragments at the rockface and widens the crack itself, worsening the process so more air is trapped on the next wave. ...read more.


The area that is eroded less quickly, juts out into the sea and is called a headland. The process of longshore drift then transports the eroded material to form the beach in the bay (see diagram below) Erosion also creates the features found in a headland. The sheer force of the waves, traps air in the weaknesses in cliffs. This will eventually weaken the rock and form cracks to develop in the headland. Further erosion creates caves. The caves then erode through the cliff to form arches. The processes of weathering and erosion cause the roof of the arch to collapse and a stack is formed. Erosion also forms wave cut notches and platforms. Broulee is a good example of a rock platform. The diagram below demonstrates how waves cut notches and platforms are formed. The diagram to the left is an example of a wave cut notch Waves erode the base of cliffs by hydraulic action, abrasion and solution. ...read more.


Three things are required for dune formation to occur: a large supply of sand, wind speeds capable of moving it, and an ideal location for its accumulationhttp://wrgis.wr.usgs.gov/docs/parks/dune/dune.html. Factors needed for sand dune formation: * Source of abundant sand * Consistent wind * Water level (dune growth accelerated by higher water levels) * Vegetation (traps and stabilises sand) In Figure 18 (below) we can see how open beaches(withput headlands for protections) like caseys beach are more subject to erosion of the foredunes during king tides and storm events. Beaches are dynamic entities, whose shape and locations naturally vary over time. In most cases when left undisturbed by human activities, these beaches are 'self-protecting' and establish a dynamic equilibrium over time. In this case, the sand eroded from the foredune is carried a short way out to sea during the erosional events, there forming an offshore bar, which absorbs wave energy there and helps protect the beach from further erosion.Then in the weeks-to-months that follow, during low tide the sand will be blown back against the duneface, restoring the foredune to its former condition. Figure 18: Eroded Foredune (Sandy Point) ...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 ...

    It would need to be relocated and would cost more. In conclusion I think it would be cost-effective to protect the east. Site 3: Near the West Pier Likewise, in Site 3 the results along with the graph indicate that the east was more protected than the west.

  2. Is Dawlish Warren is threaten by human impacts and marine processes.

    A lot more people come to Dawlish Warrens beautiful beach has become a tourist honey pot 'blue flag' people all over Britain come to view the beach this is evident in my questionnaire it shows that most people come because of the beach and often the people come from a

  1. North Stradbroke Island Report

    1.0 Introduction North Stradbroke Island is located in Moreton Bay, 30 km south east of Brisbane, Australia. It is a highly desirable tourist destination due to the range of activities accessible such whale watching, fishing and bushwalking. The island is also mined for sand, producing copious amounts of sand used in manufacturing each year.

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

    Length 6 4 4 3 4 4.2 Breadth 4 3 3 3 4 3.4 Radius or Curvature 4 3 2 2 3 2.8 Type of Pebble (see fig 1.5) 3 2 5 3 5 3.6 Section 3 (Furthest from the Sea)

  1. Coastal Processes

    These rocks will form headlands and cliffs. Soft Rocks like clay are to be eroded. The Sandstone part of Porlock Bay, on the west, which is now Gore Point, has now started to form as a headland. The Limestone part of Porlock Bay, on the East, which is now Hurlestone Point, has now started to form as a cliff.

  2. How and why do the beaches vary at Barmston, Mappleton and Hornsea?

    boundary fence line of campsite, S.hornsea 48.00 54.30 1.25 45 On field bounadary South Cliff 119.20 118.70 0.50 108.70 2.68 46 On fence line S. of South Cliff. 38.80 37.50 1.30 126.32 3.28 Fig 4.3 Distance form post to Cliff Total lost since Average erosion Post No.

  1. Find out the geological appearance, structure and composition at Peacehaven, Newhaven and Rottingdean.

    The wooden groins have rotted easily so a new design was needed, and new boulder groins are now built, as they look far more natural. Groins are relatively cheap, wooden groins cost about �6000 each. However the "zig-zag" effect is caused by long shore drift, building up sediments either side of the groins.

  2. How and Why ChristChurch Bay is Manged

    the build up of material on spits, from happening, but before this landform process can deposit something it must have been transported there so this shows that transportation is also present therefore both processes are present, (the main type of transportation could be traction).

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