crust is made up of seven major plates and a number of minor plates. The plates move because of the convection currents in the mantle caused by temperature differences within the mantle‚ leading to volcanoes and earthquakes‚ the world’s major geophysical hazards. The movement of plates due to convection currents results in a variety of types of plate boundary‚ each of which gives rise to particular types of hazards. Constructive boundaries occur where two plates are moving apart. Basalt rises
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rate. New geological features‚ rock formations‚ and locations of plates all rise and demolish some in a lifetime and others over a span of millions of years. Earth is dynamic; it constantly progresses and doesn’t rest. Through the churns and molds‚ the twists and turns‚ Earth is active because of plate tectonics and the rock cycle. The ideas and theories that make up plate tectonics have shown Earth’s dynamism. The position of plates on global maps didn’t always look similar to the maps shown today
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submittals will be given a 10 point deduction for every day of delay. Rules and Regulations: Any Violations of the following rules and regulations is sufficient cause to CANCEL the plate concerned. Cancelled plates can be repeated‚ but NO EXTENSIONS on the specified submission date can be given. a. All plates shall be done on the drawing board. b. The drawing paper must be signed by the instructor before the drawing is started.
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containing all sorts of remarkable creatures. These “geological monsters” are actually capable of producing beautiful habitual islands such as Iceland and the entire Hawaiian chain. Volcanic islands are made possible through their architect‚ plate tectonics; which is a combination of the theory of continental drift‚ by Wegener‚ and seafloor spreading‚ by Hess. Continental drift is the idea that at one point in time all of the continents formed a super continent called Pangea. Looking at the
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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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