shifting plates would collide‚ encounter resistance from one another‚ compress‚ then fold upwards to form mountains near the edges of the plates. Eons ago India and an ancient ocean called the Tethys Ocean sat on a tectonic plate. This place was shifting northward towards Asia at a rate of 10 centimeters per year. The ocean got progressively smaller unit about 55 million years ago when it collided with Asia. There was no more ocean left of lubricate the subduction and so the plates formed the
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major breakthrough was the plate tectonic paradigm‚ which allowed basins to be classified according to a unifying geodynamic theory. The driving mechanisms of subsidence are ultimately related to processes within the relatively rigid‚ cooled thermal boundary layer of the Earth known as the lithosphere. The lithosphere is composed of a number of tectonic plates that are in relative motion with one another. The relative motion produces deformation concentrated along plate boundaries which are of three
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-Rigid Outer Layer -Crust and upper mantle -tectonic plates Theory of Plate Tectonics -Theory that Earth’s surface is composed of large‚ thick plates that move and change in size -Combined hypotheses of continental drift and seafloor spreading‚ plus new observations using geophysics superconinents Pangea: super continent -Godwana: (Permian)‚ southern super continent‚ south America‚ Australia‚ new guinea Lavrasia: northern super continent Types of Plate Boundaries Divergent(constructive) Convergent(destructive)
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The Earth consists of four concentric layers: inner core‚ outer core‚ mantle . mantle: ]. The crust is made up of tectonic plates [tectonic plates: Large areas of the Earth’s crust that move slowly on the upper part of the mantle‚ often colliding and moving away from each other. ]‚ which are in constant motion. Earthquakes and volcanoes are most likely to occur at plate boundaries. 1.1 The structure of the Earth The Earth is made up of four distinct layers: 1. The inner core is in the centre
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Natural‚ Physical and Human activities. * They are created by the actions of various forces of nature such as wind‚ water and ice * Landform creating actions are Erosional process‚ Depositional process and Movement of the earth’s tectonic plates Types of Aeolian landforms : 1. Barchan (also spelled Barkhan) * A barchan (barkhan dune) is an arc-shaped (crescent-shaped) sand ridge. * produced by the action of wind predominately from one direction.
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the magnitude of the earthquake? The magnitude of the earthquake was 9.2. 3. This earthquake occurred just as geologists were figuring out plate tectonics. What principle of plate tectonics did the earthquake confirm? It confirmed the major principle of plate tectonics: the Oceanic Pacific Plate dives beneath the North American Continental Plate. 4. How many earthquakes does Alaska have per year? Alaska has on average 24‚000 earthquakes per year. 5. How many magnitude 7 earthquakes
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Quiz 4 1. The idea proposed by Alfred Wegener to explain the continental shapes and positions is known as _____. A) Pangaea B) plate tectonics C) continental drift D) rift valley E) sea floor spreading 2. In the diagram below‚ which two are the best examples of different continental positions in the past? A) North America – South America B) North America – Africa C) South America – Asia D) Europe – North America E) South America – Africa 3. According to Wegener’s model‚ what evidence
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deepest ocean trenches to the highest mountain rangers‚ plate tectonics explain all of the features from the past and present. A plate tectonic is a theory that was developed in the 1960s. According to the concept‚ Earth has a rigid layer called the lithosphere‚ which is normally 100km thick. The lithosphere is broken up into seven large continental and oceanic plates‚ six or seven medium sized regional plates‚ and various small ones. These plates do not move very far very quickly‚ and they usually slide
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A boundary in which crustal plates move past one another is called a: A) transform fault. B) convergent zone. C) divergent zone. D) rift valley. Correct answer(s): A 6. One cubic meter of which of these would weigh the most? A) seawater B) granite rock C) basaltic rock D) mantle Correct answer(s): D 7. The Hawaiian Islands formed as they pass over a hot spot in the middle of the: A) Mid-Atlantic ridge B) Nazca Plate C) Mariana Trench D) Pacific Plate. Correct answer(s): D 8
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surface of the Earth. Continental drift: Movement of the Earth’s continents comparative to each other by appearing to drift across the ocean bed. Tectonic Plate: Large pieces of the Earth’s crust that float on the mantle. These plates are constantly moving and may crash into each other or slide or move apart from each other. Continental Plate: Large sections of the surface of the Earth that move separately. Shield Volcano: Volcanoes formed by viscous lava and have broad and flat sides. This happens
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