Jessica Guerrero Geology 110 November 30‚ 2009 Chapter 6. Weathering Describe the role of external processes in the rock cycle. External processes include weathering which is the disintegration and decomposition of rock at or near earth’s surface. Mass wasting which is the transfer of rock material downslope under the influence of gravity. And erosion‚ which is the removal of material by a mobile agent‚ usually water‚ wind or ice.. These are all called external processes because
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Kamerer‚ Wesley‚ Williston Basin This report was prepared at the request of Mr. Tom Moore of Indiana University of Pennsylvania. It presents a concise overview of the Williston Basin’s key aspects including location/extent‚ tectonic setting‚ stratigraphy and major oil and gas plays. The Williston Basin covers a large geographic area stretching west from North Dakota to Montana and north from South Dakota into Saskatchewan and Manitoba provinces of Canada. The boundaries of the basin are defined by
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The Algerian desert was a harsh and desolate place; remnants of the bridge that once spanned across the mighty river Abdul were still visible. The land was almost unrecognizable‚ but memories of its beauty brought Stromae here. He could still picture where the Infinity tower once was‚ but after having no one tend to it for years it had chunks of it missing‚ probably scavenged by militia or wanderers‚ metal was worth its weight in water nowadays. Water itself was a luxury many could not afford ever
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One of the most unique factors of Death Valley is its thoroughly different geological characteristics. There is volcanic activity‚ occurrences of erosion and deposition‚ as well as interesting types of landforms‚ minerals and rocks that all makes up Death Valley’s complicated‚ but interesting geological history and features. The current aspect of the geology of Death Valley as well as the shape of its future is all but dull‚ but how did Death Valley get this‚ both intriguing and beautiful‚ landscape
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| | | | | | | | | The Erosion Process1. Water. Erosion from water typically occurs in the following ways. a. Raindrop Splash and Sheet Erosion. The first step in the erosion process begins as raindrops impact the soil surface. Raindrops typically fall with a velocity of 20-30 feet per second. The energy of these impacts are sufficient to displace soil particles as high as two feet vertically. In addition‚ the impact of a rainfall on a bare soil can compact the upper layer of
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The upper course of the river starts at the source of the rivers channel. The upper course of the river is shallow and has a narrow river channel due to vertical erosion caused by hydraulic action and corrosion. It also has an uneven steep river bed due its bedload as it is large boulders as they have rough edges. This then gets transported through the upper part of the river by traction. In addition some of the bedload also gets transported by suspension and little in siltation. As the river flows
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Watershed Characteristics 1. Drainage Area the drainage area and it is the most important watershed characteristic for hydrologic analysis. It reflects the volume of water that can be generated from a rainfall. Thus the drainage area is required as input to models ranging from simple linear prediction equations to complex computer models. Once the watershed has been delineated‚ its area can be determined‚ either by approximate map methods or by GIS. 2. Drainage Density The drainage density‚ D
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Physical Geography Filed Work The aim of this field work was to study the long profile and its characteristics of the River Lym. The velocity then drops at the mouth where it tends to deposit its load The velocity then drops at the mouth where it tends to deposit its load This is the general long profile of the river where the gradient decreases as you go down the river. The source is highest point of the river basin which usually is a mountain. This is the general long profile of the river
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7.2 vocab * Alluvial fan- a fan shaped deposit of sediment formed when a streams slope is abruptly reduced * Playa lake- a flat area on the floor of an undrained desert basin (playa) that fills and becomes a lake after heavy rain 7.2 outline * Weathering in Deserts: Although chemical weathering occurs in deserts‚ mechanical weathering is far more dominant in shaping desert landscapes. * Water in Deserts: In desert‚ water collects in streams and rivers that can deposit alluvial
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Soil Erosion Erosion is a natural process by which rock and soil are broken loose from the earth’s surface at one location and moved to another. Soil erosion forms and changes land by wearing down mountains filling valleys‚ and making rivers appear and disappear. Erosion is usually a slow and gradual process that occurs over the course of thousands or millions of years. However the rate of erosion can be speeded up by such human activities as mining. How erosion occurs? Ero0sion begins with
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