Presentation ~ above theme: "Theory of key Tectonics The lithosphere is broken into different sections referred to as plates The concept of key tectonics says that the piece of Earth’s."— Presentation transcript:




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1 theory of key Tectonics The lithosphere is damaged into different sections dubbed plates The concept of plate tectonics claims that the pieces of earth lithosphere room in constant slow movement driven through convection currents in the mantle. No plate have the right to move there is no affecting the various other plates. As plates move, they adjust the Earth’s surface ar (creating volcanoes,, hill ranges, etc.)

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3 Plate borders Plate boundaries are whereby plates fulfill Faults may type along these boundaries. Faults space breaks in the earth crust wherein rocks have actually slipped previous each other. There space 3 kinds of plate boundaries –Transform –Divergent –Convergent

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4 Transform boundaries In a transform boundary, the tardy is neither produced or destroyed At transform boundaries, 2 plates slip past each other in the opposite directions.

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5 Divergent borders The ar where two plates move apart –This can reason a mid-ocean ridge (ocean) or a rift sink (land)

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6 Divergent boundaries On land, once continents break-up apart a rift sink is formed. The valley floor sinks lower and also lower until it s listed below sea level. Red Sea was developed from a rift valley.

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7 Convergent limits A convergent border is the ar where 2 plates come together bring about a collision the can carry together. –Oceanic crust and oceanic late –Oceanic and Continental –Continental and also continental wherein these 2 plates collide the density of the plates determines which will certainly come the end on top (Oceanic crust is much more dense 보다 Continental Crust)

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8 when two key collide Oceanic → ←Continental –Because s is an ext dense 보다 continent. The ocean plates sinks and plunges beneath continent. This is subduction (the sinking below) Oceanic → ← Oceanic –2 Plates accomplish at a trench the more dense plate cd driver the other under. This is subduction (the sinking below) continental → ← continental –Head top top collision creates hill ranges

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9 Oceanic → ←Oceanic 2 oceanic key collide. The enlarge plate sinks due to the fact that it is colder and also denser than the younger plate. Oceanic-Oceanic subduction can additionally create Deep-Ocean trenches and Island Arcs

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10 Deep-Ocean trenches Deep s trenches room deep canyons that type when a bowl sinks. Most are uncovered in the Pacific Ocean. Finest example is Mariana’s Trench.

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11 Island Arcs These are a chain the volcanic islands that kind the peak plate parallel to a deep-ocean trench. Examples are the Philippine Islands, Aleutian archipelago of Alaska and the islands of Japan Trench (darker blue) Aleutian Island Arc

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12 Oceanic → ←Continental Deep ocean Trenches also occur as soon as land and ocean bowl collide and one sinks. The pacific Plate and also Juan de Fuca Plate are sinking under the phibìc American Plate and also the This often causes underwater earthquakes

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13 View throughout a bridge close to Parkfield, native the north American Plate come the Pacific Plate. The bend rail is due to the movement of the san Andreas error under the bridge since it was built.

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14 Oceanic → ←Continental seaside Mountains in Oregon and Washington are examples of once an oceanic crust sink under a continental crust. The continent crust will buckle to form a hill range.

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These hill ranges commonly parallel a deep-ocean trench.

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