lateral relative movement of the plates typically varies from zero to 100 mm annually.[2] Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere‚ each topped by its own kind of crust. Along convergent boundaries‚ subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way‚ the total surface of the globe remains the same. This prediction of plate tectonics
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usually involves a continental plate and an oceanic plate. The oceanic plate is denser than the continental plate so‚ as they move together‚ the oceanic plate is forced underneath the continental plate. The point at which this happens is called the subduction zone. As the oceanic plate is forced below the continental plate it melts to form magma and earthquakes are triggered. The magma collects to form a magma chamber. This magma then
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• Convergent boundaries- Another name of the convergent boundaries is the destructive boundaries. This kind of boundaries occur when both of the plates slide towards one another and forms a subduction zone or a acontinental collision. Typically the deep marine trenches are associated with the subduction zones. The basins which develop along with the active boundary area are often known as the "foreland basins". • Divergent boundaries- This type of boundaries are also known as the constructive
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pressures higher than normal Rocks can | |be subjected to these higher temperatures and pressures as they become buried deeper in the Earth. Such burial usually takes place | |as a result of tectonic processes such as continental collisions or subduction. In most cases‚ the overall chemistry of the | |metamorphic rock is very similar to that of the parent rock. A quartz sandstone‚ for example‚ will metamorphose into a rock that
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This devastating quake was caused because Japan is located between two major tectonic plates. When a large number of plate movements occur‚ the Pacific Plate makes its way below a subduction zone. When plate movements are not gradual and continuous along the subductions zones‚ quakes then now occur. When the subduction zones begin to deform from the plate‚ stress begins to build up in the rocks. Once the stress level increases to its limit‚ the rocks rupture along the boundary of the plate.
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MODULE E – Planetary Engineering: Mesozoic Tectonics Lesson 17 – Plate Tectonics 101 Introduction - Plate Tectonics = “Grand Unifying Theory” explaining relationships between processes within Earth From Theory of Continental Drift - Alfred Wegener in 1915 The Theory of Plate Tectonics 1) Earth’s surface consists of many lithospheric plates including crust (continental or oceanic) and immediately underlying mantle‚ cold and rigid 2) These plates are presently moving around on Earth’s surface
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This work is licensed under a Creative Commons Attribution 3.0 United States License. Module 02 Quiz with Answers 1. As early as the 1700s‚ scientists and explorers notice a remarkable coincidence of shape of the Atlantic coasts of Africa and which continent? A) North America B) Asia C) Antarctica D) South America Correct answer(s): D 2. The outermost solid layer of the Earth that comprises both continental and oceanic crust is called the: A) Hydrosphere B) Lithosphere C) Aesthenosphere
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called the proto-Atlantic or Iapetus after the father of Atlas‚ for whom the Atlantic Ocean is named. Towards the end of the Precambrian‚ the tensional forces changed to compression and subduction began. Volcanic islands grew as a result of andesitic volcanism associated with the subduction. With continued subduction and convergence‚ volcanic islands collided with North America and those rocks were thrust up on the continental margin. Deformation‚ metamorphism and magmatism accompanied this collision
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Assess the strength of the relationship between tectonic processes and major landforms on the earth’s surface. Tectonic processes have been responsible for the major landforms across the Earth’s surface. These processes are controlled by the convection currents rising from the Earth’s mantle. Firstly‚ one place where tectonic activity occurs is at oceanic to oceanic constructive plate boundaries. Here two plates diverge or move away from each other‚ pushed apart by huge convection currents
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2. 1.1 The particles that make up an atom3 Basic sub-atomic particles‚ each has different properties. Name | Symbol | Approximate relative mass | More accurate mass | Relative charge | Proton | p | 1 | 1.0000 | +1 | Neutron | n | 1 | 1.0016 | 0 | Electron | e | Almost zero | 0.000 547 | -1 | This is the culmination of the work of 5 eminent physicists‚ Dalton‚ Thomson‚ Rutherford‚ Bohr and Chadwick.Their work basically culminates in the ideas above and the important fact that an atom consists
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