emergence of the theory of plate tectonics started a revolution in the earth sciences. Since then‚ scientists have verified and refined this theory‚ and now have a much better understanding of how our planet has been shaped by plate-tectonic processes. We now know that‚ directly or indirectly‚ plate tectonics influences nearly all geologic processes‚ past and present. Indeed‚ the notion that the entire Earth’s surface is continually shifting has profoundly changed the way we view our world. People
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1. Compare the age of igneous rock found near the mid-ocean ridge with that of igneous rock found farther away from the ridge. The ages of the igneous rock found near the mid-ocean ridge was younger than the igneous rock found farther away from the ridge. This is because of convection currents. Magma rises because it is less dense. It is forced out of the ridge‚ it spreads apart‚ and when it cools‚ it becomes new seafloor. This is why newer seafloor (igneous rock) is younger when it is closer to
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Plate tectonics provide the perfect clues to where and what seismic hazard will occur? Discuss. It is at the boundaries of the planet’s tectonic plates that most of the world’s major landforms occur and where earthquakes‚ volcanic and mountain building zones are located. The surface of the planet is made up of seven large and several smaller rigid tectonic plates which float on the semi-molton asthenosphere; the movement of these plates is influenced by the convection cells under the lithosphere
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Activity No. 2 Simulating Movement of Tectonic Plates Problem: How do tectonic plates move? What you need: -4 pieces of colored modeling clay -cardboard -newspaper What to do: 1.Flatten two pieces of modeling clay on the newspaper. 2.Cut the center of the clay strips and insert a cardboard on the part of the clay that was cut. 3.Push both ends of the clay strips.Observed what is formed. 4.Repeat step one in the other two pieces of modeling clay. 5.Slowly pull both
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Continental Drift and Plate Tectonics Theory (Part 1a) Introduction: The Beginning of the “Continental Drift Theory” In the middle of the eighteenth century‚ James Hutton proposed a theory‚ uniformitarianism; “the present is the key to the past”. It held that processes such as geologic forces- gradual and catastrophic-occurring in the present were the same that operated in the past. (Matt Rosenberg‚ 2004) This theory coincides with the theory of Continental Drift that was first proposed by Abraham
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boundaries by which an oceanic plate slides slowly under a continental plate into the Earth’s mantle‚ as the result of pressure and friction. After a long period of time the overriding continental plate is lifted up creating a mountain range. This is how the Himalayas were formed. Sometimes the extreme heat and pressure exerted on the subducting oceanic plate causes an uplift of magma from the mantle which rises above the surface‚ creating a volcano. When two plates are moving they don’t always slide
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Plate Tectonics Introduction Continental Drift Seafloor Spreading Plate Tectonics Divergent Plate Boundaries Convergent Plate Boundaries Transform Plate Boundaries Summary This curious world we inhabit is more wonderful than convenient; more beautiful than it is useful; it is more to be admired and enjoyed than used. Henry David Thoreau Introduction • • • Earth’s lithosphere is divided into mobile plates. Plate tectonics describes the distribution and motion of the plates. The theory
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points in this report revolve around tectonic plate subduction‚ uplift around the Denali fault‚ and the rock composition of the mountain. The combination of these three forces are integral reasons for why the mountain has been able to grow to its size and why it’s been able to maintain its height. To understand how subduction has affected Denali and the Alaska mountain range‚ you first need to understand how plate tectonics work. The theory of plate tectonics centers on the idea that the Earth’s
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The Impact Of Plate Tectonics on the Caribbean * The Caribbean Plate is a mostly oceanic tectonic plate underlying Central America and the Caribbean Sea off the north coast of South America. * Volcanic activity in the Caribbean itself‚ as distinct from Central America‚ is largely limited to the eastern Caribbean. Here‚ the Caribbean plate‚ moving approximately west to east‚ meets the North American plate‚ which is moving approximately east to west. This creates what is known as a seductions
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evidence for plate tectonics. It is the patterns on the rocks which presented a problem with the theory. There was thought to be a problem with the description of the movement being “slow and gradual”. According to scientists and geologists the movement would have been performed at a rapid speed. A physicist then predicted where the evidence for this rapid movement could be found and it was later proved that the argument against the theory was correct. The biblical view of plate tectonics conveys an
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