I will discus the history of earthquakes‚ the kinds and locations of earthquakes‚ earthquake effects‚ intensity scales‚ prediction‚ and my own predictions. An earthquake can be defined as vibrations produced in the earth’s crust. Tectonic plates have friction between them which builds up as it tries to push away and suddenly ruptures and then rebounds. The vibrations can range from barely noticeable to a disastrous‚ and destructive act of nature. Six kinds of shock waves are generated
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seismic activity caused by the build-up of tension at the three types of plate boundaries: destructive‚ constructive and conservative. The pressure is suddenly released as the plates jerk past each other‚ sending out seismic waves from the focus that travel through different parts of the earth. The movement of convection currents within the Earth’s mantle causing the crust to become mobile which creates the different types plate margins‚ makes the cause due to physical factors. However human activity
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500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks. The role of plate tectonics in the origin of igneous rock is extremely important. Igneous rock is formed from magma that reaches the continental and oceanic crust or through hot spots that are around the world. There are three different places where igneous rocks can form; where the lithospheric plates pull apart at mid ocean ridges‚ where plates come together at seduction zones‚ and where continental
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Geo assessment Mt Etna An eruption begins when pressure on a magma chamber forces magma up through the conduit and out the volcano’s vents. When the magma chamber has been completely filled‚ the pressure in the pipe will build up very high resulting in an explosion. When magma reaches earth’s surface it is called lava. It may pour out in gentle streams called lava flows or erupt violently into the air. Rocks ripped loose from the inside of the volcano or torn apart by the gas may be shot into the
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There are four major factors that often contribute to the formation of hydrothermal copper porphyry: 1) readily available mineralizing fluid solutions that dissolve and transport metals‚ 2) openings in rocks which allow permeable flow of hydrothermal fluids and the metals that they transport in solution‚ 3) available sites within the fractured rocks which allow for deposition of the minerals from solution‚ and 4) the requisite chemical reactions that contribute to that deposition (Bateman‚ 1967)
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Caldera Caldera (huge pits in the ground caused by volcanic eruptions) * Check for lava rocks near the happening * Magma Chamber Magma Chamber January 10‚ 2013 Lecture Notes Tectonic Plates * They float (lower density * They move at a rate of cm/ year * Plate tectonics deform continents when they collide with other continents Continental Crust: 2.7 g/cm cubed Oceanic Crust: 3.3 g/cm cubed Convergent Boundary: When the arrows are pointed towards the other direction
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Gondwana: Nothofagus or Southern Beech. A genus of around 40 extant species of trees. 3. Describe the theory of plate tectonics and identify its role in the formation of Australia as an island continent: The theory of plate tectonics states that Earth’s crust and the outermost part of the mantle are mechanically connected to each other. This layer is broken into several plates that move about Earth’s surface. As they move about‚ they are constantly interacting with each other along their boundaries
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Over time plate movement or subduction causes increasing strain on "sticking points" within the crust. Similar to if you rub two pieces of sand paper together‚ they will initially resist sliding until enough strain is built up. At that point‚ the "sticking point" is weakened and releases the built up strain. Before this theory was developed‚ scientists were unsure whether earthquakes caused faulting (plate movement) of faulting caused earthquakes. Today‚ over
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Deirdre Coffield English 090-B10 July 26‚ 2010 Earth vs. humans When the earth began it was filled with gases and molecules. Then there was water‚ plants and animals and years ago man came. Through the years humans have evolved beyond our expectations‚ while this is exciting we have caused damage and deterioration to our environment. From the air we breathe to the water we drink and the animals we consume‚ the environment is constantly being affected. First the very stuff we breathe
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now on a collision course with a smaller plate once connected to Africa and South America‚ known as the Caribbean plate. For years and years to come following the convergent plate’s activities; thrust faults and folds piled up marine sediments and rocks‚ which resulted in an orogenic process which lead to the building up of the Ouachita-Appalachian mountain system. This was one of the final events in the formation of Pangaea. Once the collision of the plates stopped‚ exposure and uplift occurred with
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