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

Fluvioglacial Landforms

Extracts from this document...

Introduction

Out line the ways in which glaciers transport debris (5 marks) Glaciers are capable of transporting large amount of debris and this waste material is classified according to the position in the glacier that it is found. There are therefore three ways in which glaciers transport debris. The first is called supraglacial and is where material, often from rock falls and weathering processes, is carried on top of the glacier. Secondly there is englacial. This is where debris is transported within the glacier itself. This material may originally be from supraglacial material which was covered with further ice and snow, from material which has fallen into the crevasses of the glacier or sunk into the ice via a process know as localised pressure melting which occurs beneath large rocks and stones. If the debris continues to sink into the glacier it will become subglacial debris. This is the final way in which glaciers transport material and, as the name suggests, it is where debris is held underneath the glacier. This debris may also have been collected by processes such as plucking and abrasion. Describe and explain the variety and location of fluvioglacial landforms (20 marks) ...read more.

Middle

Varves are layers of sediment which are deposited in pairs with each set representing a year's deposition. They are found in the bottom of proglacial lakes. As the melt water stream enters the lake energy is lost and so the sediment is deposited. The width of the band (varve) which is deposited tells us whether it was formed in the summer or winter months. If the band is wide we know that the deposition occurred during the summer months as there are large amount of melt water which allow the streams to carry courser material (such as sand and gravel). During the winter months, when there is little melt water, the size of the sediment is limited to silt and clay which results in the bands being thin and fine. Studies have been conducted into the Varves looking at climate change, with thicker bands being a sign of warmer climates. The colour of the bands can also be an indicator of the climatic conditions with darker sediment thought to be more organic matter and so being a sign of more organic matter and a warmer climate. During ice retreats kettle holes may form as dead ice becomes detached. ...read more.

Conclusion

Kame terraces can be found in valley called Kingsdale in the Yorkshire Dales, where one terrace extends for around two kilometres along the north side of the valley and is approximately two meters high for most of its length. The final landform which is formed by fluvioglacial processes is Braided Streams. These are river channels which are subdivided by numerous islets and channels, where debris laden streams loose water at the end of the melting period and so can carry less material. This material is deposited in the channel causing it to divide and then in some cases rejoin. Over time the bars produced will become stabilised by vegetation and then become more permanent features. The bars which are left unvegetated lack stability and can be moved and re-formed during floods and high periods of discharge. On the outwash plain of Iceland in the S�lheimasandur region braiding occurs widely. Much like glacial deposits, fluvioglacial deposits are often difficult to identify when out in the field, and repeated advance and retreat can modify and alter the appearance of the landforms. Weathering, erosion and colonisation will also have an affect on the landforms. ?? ?? ?? ?? Geography Cover Lesson Essays Olivia Knight 1 ...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 Hydrology & Fluvial Geomorphology 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 Hydrology & Fluvial Geomorphology essays

  1. To what extent are fluvio-glacial deposits and landforms distinctive?

    Ice continues moving downwards due to gravity and pulls along the attached melt-water, and thus the rock too. The melt-water is initially produced due to the temperature reaching the pressure melting point of the ice, but after a short period of time falling again to cause the re-freezing of the water.

  2. River Studies

    Task 4: Presenting the Results. You have been given data concerning the four sites, now you need to do the calculations and draw the cross-sections. Site 1: Mata Grande Distance from source 4km. Gradient: 6� Distance from left bank (cm) 0 25 50 75 100 125 150 159 Depth (cm)

  1. The Afon Glaslyn, SnowdoniaCase Study of fluvial landforms and processes

    Many waterfalls form when rivers meet a band of band of softer rock after flowing on hard rock. The underlying softer rock is worn away more quickly, and the harder rock is undercut and overhangs. In time the hard rock becomes unsupported and collapses.

  2. A corrie on Ben Lui in Scotland

    resilient chunk of rock (often a granite plug or other volcanic structure). The force of the glacier erodes the surrounding softer material, leaving the rocky block standing proud from the surrounding terrain. Frequently the crag serves as a partial shelter to softer material in the wake of the glacier, which

  1. Desert Landforms

    the gradients will be greatest in the upper course and lowest in the lower course 12.

  2. Describe the process by which glaciers move

    In Glen Rossa on the Isle of Arran, a sample of 50 stones was taken from the till deposits. Their orientation indicated that the direction of the glacier flow NNW/SSE. The stones had been pushed upwards to an angle of 25*, indicating a glacier re-advance after the initial deposition.

  1. The changing landforms down a river's long profile

    The source: Its source is in an area of high relief with steep V shaped valleys. The river here is narrow with lots of resistance and the erosion is mainly vertical. The bedload size is large and there is also a waterfall and some rapids at Taylorgill Force.

  2. Main features and landforms of glacial erosion.

    Roche Moutonnee: are outcrops of resistant bed rock with a gentle abraded slope on what would have been the upstream side of the ice (stoss slope) and a steep rougher slope on the downstream side (lee slope). The name is French and translates into English as 'sheep rocks', a good description of them when seen from a distance.

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