LO2 a) Erosion Moving masses of ice (glaciers) cause erosion‚ and as a result change landscapes dramatically. There are 3 processes that cause direct glacial erosion: o Abrasion o Crushing o Plucking Meltwater erosion is an indirect process of erosion. Abrasion Rock fragments at the base of the glacier grind against the bedrock wearing down it’s surface. As a result‚ the surface becomes smooth. These smoothed bedrock surfaces are called striations. Fine silt particles are formed‚ called rock flour
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Chapter 15 Test: Glaciers and Erosion Matching: 1. ________ pyramid-like peak made of arêtes A. snowfield 2. ________the unsorted material left beneath B. snowline the glacier when the ice melts 3. ________depressions where most outwash plains are pitted C. cirque 4. ________theory that most scientists now accept D. kettles 5. ________large cracks E. horn 6. ________masses of ice that occupy millions of square kilometers F. Milanokovitch Theory 7. ________an almost motionless
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Unconstrained these glaciers cover vast areas. Topography does not play a major role in the extent of these glaciers. Ice sheets and ice caps fall into the same category. The difference between them is one of scale. Ice sheets are larger. Typically the dividing line is around 50‚000 km2. The glaciers that cover Antarctica and Greenland are ice sheets‚ and the glacier that covers Iceland is an ice cap. Two main components of ice sheets and ice caps are ice domes and outlet glacier. Ice shelves An ice
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Glaciers We are all familiar with rivers. Rivers collect water and allow it to flow downhill. A glacier is like a river‚ but it a large slow-moving river of ice‚ formed from compacted layers of snow that has basically accumulated for more that a year‚ which slowly deforms and flows in response to gravity and high pressure. The first year of snow fall is called a neve‚ then after the snow stay for more that one winter it’s called a firn. (Grabianowski). Extensive glaciers can be found
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Coastal Erosion The beaches of North Carolina’s coastline face an ongoing threat: coastal erosion. Though mostly gradual and relatively unnoticeable over the course of a year or two‚ the rising sea level combined with a season of storms or hurricanes can cause anywhere from a few feet to hundreds of feet of this delicate shoreline being stripped away. Solutions are constantly being studied and discussed‚ but often‚ the solution to erosion can be just as damaging as erosion itself. While vacationers
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Glaciers are present year-round‚ but vary in their rate of melting. For a pack of ice to qualify as a glacier‚ it exist continually rather than just seasonally. For reasons that are not completely clear‚ the planet has experienced several major Ice Ages in its history‚ when glaciers extended as far south as New York‚ USA and Paris‚ France. So many glaciers piled up that the sea level was lowered by 100 m (328 ft)‚ opening up large areas of land such as the North Sea‚ the Bering strait‚ and connecting
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Shrinking Glaciers 4/10/12 As a direct result of anthropogenic induced climate change there have been a number of observed changes to our environment and potential hazards created that threaten our planet. Along with increased storm frequency‚ abnormal precipitation patterns‚ and increasing sea levels that grab the headlines in the news‚ a very critical issue is threatening mountain communities across the globe. With each subsequent year global mean temperatures rise‚ mountain glaciers are shrinking2
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Soil and Glaciers Worksheet From Visualizing Earth Science‚ by Merali‚ Z.‚ and Skinner‚ B. J‚ 2009‚ Hoboken‚ NJ: Wiley. Copyright 2009 by Wiley. Adapted with permission. Part 1 Size grades of soil are named sand‚ silt‚ and clay‚ which includes colloids. Size grades are defined using the metric system. Use Figure 4.8 from the textbook to fill in the following chart. Specify the type and size and description of the particle. In some cases‚ particle size will be less than some value or greater
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Siachen Glacier The Siachen Glacier is located in the East Karakoram Himalaya‚ at approximately 35.5° N 76.9° E. It is one of the five largest glaciers in the Karakoram‚ situated at an average altitude of 5‚400 meters above sea level. Most of the Siachen Glacier is a hotly contested territory between Pakistan and India. The Siachen glacier lies south of the great watershed that separates Central Asia from the Indian subcontinent‚ and Pakistan from China in this region. The 78 km long Siachen glacier
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Thobaben and Stephen Hamilton set out to better understand and characterize a variety of wetland’s geomorphic setting‚ water sources‚ and hydrodynamics within their study “The Relative Importance of Groundwater and its Ecological Implications in Diverse Glacial Wetlands” (2014). Thobaben and Hamilton’s study examined a set of 24 wetlands that ranged from bog to fens to swamps like conditions within southern lower Michigan and considered the relationships between a wetland’s water sources and its geomorphic
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