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

Isle of Purbeck and Swanage - Map, draw and make notes on features associated with a concordant geology.

Extracts from this document...


Isle of Purbeck and Swanage * Map, draw and make notes on features associated with a concordant geology. * These include: 1) Headlands at Durlston, Peveril Point and Handfast Point 2) Intervening bays especially Studland 3) Erosional Features at the Foreland 4) Double Spit at Poole Harbour Durlston At Durlston Point the Middle Purbeck limestone is clearly visible in the cliff. The Cinder Bed, a useful marker oyster bed in the middle of the Purbeck strata descends to the shore. Softer mudstones of the Lower Purbeck can be seen beneath the Middle Purbeck limestone. The scar of dumped Portland Stone beneath some flats, constructed surprisingly close to the cliff edge, covers part of the Lower Purbeck exposure and affects the scenery of the bay. Thin-bedded lagoonal limestones alternate with shales. This part of the succession is high in the Middle Purbeck Formation with plant debris and pyrite being more abundant. Kaolinite also occurs here amongst the clay minerals in this part of the succession. Some of the limestones were cemented early with early loss of aragonite and these are particularly good for showing dinosaur footprints. Other thin shell beds remain at or just below the water table and when they were buried they preserved aragonite. Peveril Point This stone headland is formed of a hard bed of limestone (known as Purbeck Marble), which runs from Herston to the west of Swanage to Peveril Point and then eastwards under the English Channel. ...read more.


On the other hand the flood, at least at the bottom, is stronger than the ebb in the upper reaches of the harbour. Thus, at both ends of the harbour there is evidence of a tendency to sweep material out of it, either up into the river mouth or out to the sea. Sediment is therefore trapped on the mudflats and salt marshes of the margins. This could be the reason why this feature has remained so long as a rather anomalous feature of the coast. The tidal regime at Poole harbour is unusual, although the total rise and fall of the tide there is not that great. The double high water, which is such a well-known feature at Southampton, is much more marked at Poole, and in fact at neap tides each month it is possible to detect "triple high water". At neap tides, however, the total range is little more than two feet (0.6m), whereas after new and full moon it rises to somewhat over six feet (1.8m). It will not be exactly the same at the South Haven Peninsula but this gives some idea of the rather limited tidal range. A consequence of this is that although there is much shallow water there is not an extensive area of exposed sand-flats or mud flats off the peninsula at low tide (such as you find in the Bristol Channel region with its high tidal ranges). Christchurch * Visit, research and make notes on coastal erosion at Barton-on-sea and the management response to the challenge of rapid erosion. ...read more.


* Commercial fishing - a small fishing fleet is harboured at Keyhaven. If the spit were breached, the harbour would no longer be such a safe mooring. * History - the castle (Hurst Castle) was constructed in the reign of Henry VIII to defend the country from feared invasions by the Catholic powers of Europe. It has been altered many times since it was first built and it was manned during both World Wars. Hengistbury Head Hengistbury Head is a headland and hill of about 36m in height and is situated between Christchurch Harbour and Poole Bay. It is less than one square kilometre in area and is a particularly valuable piece of unspoilt countryside. Because Hengistbury Head is notable for metalworking in Iron Age times, the archaeology and geology have a direct relationship. Iron was manufactured from the local siderite and other minerals were imported to the area for silver extraction. Gold and bronze was worked here and Kimmeridge oil shale was turned on lathes to make armlets. This map by John Lavender summarises the discoveries. It also attempts to estimate the position of the coastline 2000 years ago. Sea level in Southampton has risen at a rate of about 1 to 2mm per year (and is rising even more rapidly now). The Christchurch Harbour side of the headland would have been very different with lower sea level and this part of the harbour might have been narrower. The alluvium and salt marshes, however, would have been less developed at that time. What is very likely is that important archaeological remains lie buried under the alluvium and the salt marsh north of the headland. http://www.soton.ac.uk/~imw/barteros.htm http://www.soton.ac.uk/~imw/hengist.htm http://www.nelsonthornes.com/secondary/geography/essential/essen_cs1.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 ...

    It shows the steepness of the beaches in all the sites and shows the shape of the beach. Pebble Analysis:- The roundness chart shows that class 1 represents the very angular stones; class 2 represents the angular stones; whilst 3 represents the sub-angular; 4 represents the sub-rounded; 5 represents the rounded and class 6 represents the well-rounded stones.

  2. North Stradbroke Island Report

    Human Impact Residents and businesses of Brisbane have recreationally and commercially fished Moreton Bay for many years. Between 2500 and 3500 tonnes of seafood are commercially harvested annually from Moreton Bay and 2000 tonnes of fish are caught by recreational fishers each year (EPA).

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

    Gore Point results are in dark grey, Hulstone Point results are in light grey Class results Shape Gore Point Hulstone Point Very Rounded 25 93 Rounded 45 67 Sub Rounded 39 17 Sub-Angular 37 3 Angular 22 1 Very Angular 14 0 Gore Point results are in dark grey, Hulstone Point results are in light grey.

  2. Swanage and Studland

    In our own time I worked hard and managed to complete three more methods of data collection, the first of which was a couple of car park surveys. The method for this task was to record the last two letters of the number plates of each car in the car parks.

  1. Investigate the dominant Coastal processes acting on Porlock bay and also consider suitable management ...

    The slope angle and distance of each facet will be determined using a Clinometer (Fig 10) and a Tape-measure (Fig 11). At the regular intervals along length of transect a stone will be sampled, the longer side will be measured using a Pebbleometer (Fig 12).

  2. "Describe and explain the differences in the coastline North and South of the Tower ...

    Conclusion: Waves which arrive at a rate of more than eight per minute will cause erosion and so the waves on both the North and south beach will erode the coastline. However, the average wave frequency for the North beach is more than the south beach so it should in theory cause more erosion.

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

    In Studland Bay there's a beach and the reason for this is that it has retreated about 2km (maximum) from the original cliff line and so this means that incoming waves have longer to travel till they reach the cliff and since the shoreline gets shallower it means tat the

  2. Coasts Revision Notes - AQA Geography

    * This part of the cliff experiences rapid erosion thorough ? abrasion, where material carried by the waves (eg rocks) are hurled against it. Also, H.A where the pressure of the air in the cracks from the water compress and release which erodes it.

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