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Plate Tectonics and Landforms/ Earthquakes

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Tommy Shinske

on 12 June 2013

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Transcript of Plate Tectonics and Landforms/ Earthquakes

The theory of the Continental drift its a theory when all of the continents were joined in a super-continent, which scientist call (Pangaea). Over a vast period of time, the continents drifted apart to their current locations. Plate Tectonics and Landforms/ Earthquakes The Theory of Continental drift. How Tectonic Plates Move Plate Tectonics we will cover the three main plate boundaries Hotspots A segment of the Earths crust that moves reiterative to other segments and is characterized by volcanic and seismic activity around margins. Hotspots are pockets of magma in the mantle. Volcanoes get there source of magma from hotspots.m Hotspots form in the middle of plates and volcanoes getting produced from the plate use the hot spot. When the hot spot passes the volcano it moves down to the next volcano in the chain and gives that a source of magma. Think of it as a chain. The Three Plate Boundaries and How they Move They include
conversion
diversion
transform What parts of Earth make plate tectonics Tectonics is the theory that the outer rigid layer of the Earth (the lithosphere) is divided into a couple dozen "plates" that mover around across the Earths surface relative to each other. Theory of plate tectonics The tectonic plates comprise the bottom of the crust and the top of the Earths mantle. conversion conversion happens when two plates come together As you can see, the hotspot is under the surface. Realize how there is a chain of volcanoes behind the hotspot that probably used the hotspot for it's source of magma in the past. some land forms caused by conversion are mountains, trenches and subduction zones. Diversion Hotspots and Volcanoes/Island Arcs Diversion happens when two plates spread apart. Some of the land forms caused by Diversion is seafloor spreading and oceanic rifts. Hot spots have a lot to do with Island Arcs and Volcanoes. Island arcs are chains of Volcanoes where a plate tectonic went under another plate and formed a curve chain. These chains of volcanoes use Hotspots inside the plate as their source of magma when they erupt. These hotspots go down the line of the curved chain and give off their magma to many different volcanoes.


Definition of earthquakes: A series of vibration induced int he earths crust by the abrupt rupture and rebound of rocks in witch elastic strain has been slowly accumulating.

What causes them? Earthquakes are caused when tension is released from the rocks in the earths crust and upper mantel. This tension is due to friction between what scientist believe are large plates floating on magma on the earths surface. sometimes earthquakes happen when the rocks in the earths crust bend and break. this causes shock waves to travel on earths surface, resulting in widespread destruction. Transform The Interior of the Earth transform boundaries happen when two plates slide laterally past each other can cause faults and shallow destructive earth quakes. The interior of the Earth has many layers and is VERY hot! The outer layer that we walk and live on is called the Crust. The Crust is about 25 miles thick! Then there is the mantle, which is the second layer of the core and is the thickest layer. The mantle is made up of solid rock. The liquid outer core is made up super-heated magma. Lastly, there is the inner core which is the hottest, and brightest layer. Earthquakes The Cycling of Matter This is a picture of a fault. The epicenter is the point on the surface of the earth directly above the focus of an earthquake. The focus is were the energy is released. Earthquakes occur when plates on either side of the fault move. Most earthquakes are a result of huge pieces of rock that press against each other and cause changes in the earth. Energy builds up between the rocks, then rocks suddenly slip past each other. The point where energy is released is called the focus.Above the focus is the epicenter. The place where the ground breaks in the earths outer layer is called a fault. the fault pictured here is a transform fault becuse the plates slide past one another. How Plates Move plates move when special convection in the earths mental caused by radioactive decay of the core. This causes the plates to be pushed and pulled by the rocks in the mantel. Hi This picture shows the layers of the earth and the core were the mantle is. Energy flows through ecosystem and matter cycles through ecosystems include the ocean, swamp, any where with life, energy includes solar radiation thermal vents and other forms of energy. The cycling of matter drives plate tectonics. Earth is an open system, energy flows and cycles through the system and matter cycles within. The movement of Earth's plates is driven by plate tectonics. The flow of heat from radioactivity within the earth also drives plate tectonics. Hi This is a picture that shows a fault. It appers to be a transform fault because the plates are sliding vertically. Below the surface it shows the focus. This is where the earthquakes begins and were energy is released. Above the focus is the epicenter. This is where the earthquake begins on the surface. As you can see, the hot spot is inside of the plate and giving it's magma to the volcano as a source of magma.
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