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Glaciers move because the surface of the ice is sloped. This generates a stress on the ice, which is proportional to the slope and to the depth below the surface. As shown in Figure 16.12, the stresses are quite small near the ice surface but much larger at depth, and also greater in areas where the ice surface is relatively steep.
Study with Quizlet and memorize flashcards containing terms like a-is found in mountainous regions, b-exists where a large part of a continent is covered by glacial ice, d-10 and more.
Glaciers are categorized by their morphology, thermal characteristics, and behavior. Alpine glaciers, also known as mountain glaciers or cirque glaciers, form on the crests and slopes of mountains. An alpine glacier that fills a valley is sometimes called a valley glacier.
24 Νοε 2023 · Any deformation motion in the lower ice will be transmitted to the ice immediately above it, so although the red arrows get shorter towards the top, the ice velocity increases upwards (blue arrows). The upper ice (above the red dashed line) does not flow, but it is pushed along with the lower ice.
Describe how the ideas behind plate tectonics started with Alfred Wegener’s hypothesis of continental drift. Describe the physical and chemical layers of the Earth and how they affect plate movement. Explain how movement at the three types of plate boundaries causes earthquakes, volcanoes, and mountain building.
24 Απρ 2024 · The explanation is that plates move in a rotational manner. The North American Plate, for example, rotates counter-clockwise; the Eurasian Plate rotates clockwise. Boundaries between the plates are of three types: divergent (i.e., moving apart), convergent (i.e., moving together), and transform (moving side by side).
Sun and Wind. Wind is a major force in propelling water across the globe in surface currents. When air moves across the ocean’s surface, it pulls the top layers of water with it through friction, the force of resistance between two touching materials moving over one another.
