Geology Final Chapter 18 Mass Wasting (movement) Mass Wasting – process in which gravity pulls soil‚ debris‚ sediment‚ and broken rock (collectively known as regolith) down a hillside or cliff Avoidance – approach for avoiding a geologic hazard such as mass wasting by learning to recognize the characteristics of an unstable slope and by not building or engaging in other activities there * with growing population‚ people are now building communities with neighborhoods in places like stream
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Long shore drift is a process where sediment is moved along a beach by the action of waves.When the waves approach a beach‚ the base of the waves drags along the sea bed picking up sediment and causing the wave to break‚ the wave then swashes up onto the beach face carrying sediment with it. Gradually the build up of sediment pushes the sediment up the beach which it is then able to dry out to become light enough to be deposited further up the beach. The sediment found at south muriwai beach is made
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Alluvial fan sediments are dominated by gravely deposits‚ which typically show down-fan decease in grain size and bed thickness and an increase in sediment sorting. Overall‚ alluvial fan deposits tend to be characterized by strongly developed thickening and coarsening upward successions‚ caused by active fan progradation or outbuilding. 1.1 Debris flow dominated fans facies Debris flow dominated fans facies are characterized by lobes of poorly sorted‚ coarse sediment‚ commonly with
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GEOGRAPHY PORTFOLIO BY EDEXEL GEOGRAPHY CONTROLLED ASSESSMENT 2011: What factors affect the gradient of the beach? ( Contents Page 1. Title page...............................pg 1 2. Contents page........................pg 2 3. Purpose of investigation.........pg 3‚4‚5 4. Methods of Data Collection.....pg 7‚8 5. Data Representation.................pg 9‚10‚11‚12‚13‚14 6. Analysis & Conclusion.......................pg ‚15‚ 16‚17‚18
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Headland. This means the waves no longer erode the northern side of the headland and material‚ such as Awhitu sand stone and volcanic rock are no longer eroded and deposited in to the sea at Muriwai. Because of the lack of erosion‚ the amount of sediment transported northward‚ up the beach‚ is also affected. This human modification and its impact on processes can be summed up in the following diagrams. (complete appropriate diagrams) * Human modification 2: Construction of Revetment (boulders
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S11048002. Rivers‚ as they flow to the sea they carry with them sediments. Sediment transportation is dominant in the upland flows where the velocity or speed of the river flow is very fast and the slope is of a steep type. As the sediments are carried along to the lowland‚ the water velocity is reduced and so there is a reduction in the speed of the river flow and also the slope is of a gentle sloping thus causing the sediments to be deposited on the lower parts of a river. The Rewa River is one
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Chapter 15 River Systems Use the websites and your book to help you answer the following questions about river erosion and deposition http://ga.water.usgs.gov/edu/mearthsw.html click on “Rivers” (15.2 in book - Stream Erosion) 1. What are watersheds? An area or ridge of land that separates waters flowing to different rivers‚ basins‚ or seas. 2. What does a watershed consist of? Watershed consists of the few underground springs and precipitation runoff from the land. 3. Why are watersheds
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particles being deposited in the river bed as energy levels drop. The middle stage features mainly lateral erosion this is due to the rivers channel slightly flattening out as it goes down. Attrition of larger particles in this stage means that sediment particle size decreases from source to mouth. More material carried in the river’s suspension as particle sizes decreases due to a higher level of erosion. Some larger particles are moved by saltation. This therefore means particles such as sand
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Brighton. The three sets of data are the distance from sea wall/backshore‚ the sediment height below groyne and the average size of sediment. Method | Data collection technique(How it was carried out) | Justification of data collection method(why it was carried out) | 1. Beach cross profiles (for eastern and western sides of groyne) fig 4(figure 4 demonstrates how we measured the vertical drop)2. Sediment sampling3. Photographs | * We were allocated two groynes to collect our fieldwork
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surface under the lake is buried deeply. Geophysical studies in both Watkins Glen and Geneva show that a wide mass of glacial deposits fills the rock valley which forms Seneca Lake. There are as much as 150-200 meters in each basin of glacial-lake sediments. This entire mass was in place by 12‚000 years ago. At the same time‚ deltas have been built at several different locations along the shore and a large amount of stream deposits have been poured in to form both the alluvial fans (Halfman‚ 5). One
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