tectonic nature of the Earth. Such earthquakes are called tectonic earthquakes. The Earth’s lithosphere is a patchwork of plates in slow but constant motion caused by the release to space of the heat in the Earth’s mantle and core. The heat causes the rock in the Earth to flow on geological timescales‚ so that the plates move slowly but surely. Plate boundaries lock as the plates move past each other‚ creating frictional stress. When the frictional stress
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can the movements of the continents be explained‚ or how do deep ocean trenches affect us? The three main theories that explain how these things work are sea-floor spreading‚ continental drift‚ and plate tectonics. These are the theories that give us explanation as to why the continents move‚ how plate tectonics work‚ etc. These theories were formed by different scientists and with different forms of evidence‚ some scientists used one of the other two theories to support theirs‚ and one theory is
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crust‚ & continental crust. Plates: The lithosphere broken up into individual pieces. They move over the mantles Asthenosphere. Movement of Earth’s Plates:The plates move due to the mantles CONVECTION CELLS: warm material rises toward surface‚ cools&descends back into the interior. Creating volcanoes‚ earthquakes‚ MTNS. Crust: Earth’s outer most layer 2typesContintinential: thick w/silicon‚aluminum-Oceanic crust:Thin denser w/ dark igneous rocks (basalt/gabbro) PLATE TECHTONIC THEORY:The lithosphere
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native only to itself. The purpose of this essay is to discuss the geological history of the formation‚ as well as the biological origins‚ of New Zealand. It will also discuss how the major land-forming processes of volcanism‚ glaciation and tectonic plates have shaped the country and defined it’s native flora and fauna. Eighty-five million years ago the landmass now known as New Zealand broke away from the supercontinent Gondwana. This massive landmass moved into the Pacific Ocean and eventually became
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pieces of evidence towards proving that the plate tectonics theory is valid” Discuss the extent to which you agree with this statement (40m) The theory of plate tectonics explains the structure and motion of the Earth’s lithosphere. The theory states that the Earth’s crust is split into large sections called tectonic plates‚ and these move relative to one another creating boundaries at which the plates converge‚ diverge or move past each other. These plates are either continental or oceanic and are
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Analyse the factors that cause differences in the hazards posed by volcanoes around the world (40 marks) Your main factors can be put into two simple categories. Human and physical. From there you can then further explore the factors. In my essay I will mainly focus on viscosity‚ location‚ settlement and perception and explore how the physical and human factors intertwine with each other through one simple idea that physical factors dictate the hazard while human factors exacerbate the hazard. From
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the mid-ocean ridges because they are divergent plate boundaries.-areas where earth’s lithospheric plates are moving away from each other. The movement causes the crust to be very "thin ". The thinning allows the magma to come to the surface and form a volcano. Volcanoes can also occur at tectonic plate boundaries because Volcanoes form where the earth’s crust is thin and the magma can flow to the surface easier. This happens mostly at the edge of the plates. Volcanoes lastly can occur at subduction zones
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shook the West of Northern Sumatra‚ Indonesia‚ as well as many other neighboring countries‚ was of a great 9.0 magnitude on the Richter scale. “At the source of the earthquake‚ the interface between the India plate and the Burma plate dips about 10 degrees to the east-northeast. The subducting plate dips more steeply at greater depths”(USGS). The quake occurred when the Earth’s crust‚ a 1‚200 km segment of the crust‚ shifted
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Haiti - and the island of Hispaniola as a whole - lies on the boundary between two major tectonic plates‚ Caribbean and North America‚ which slide past each other at a speed of about 2 cm/year (Figure D). This relative motion causes the build up of pressure on several faults lines across the island. When the pressure exceeds the mechanical resistance
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What is Sea-floor spreading? Seafloor spreading is a process of plate tectonics in which new oceanic crust is created as large lumps of the Earth ’s crust split apart from each other and magma shafts up to fill the gap. Who discovered sea-floor spreading? The man who discovered sea floor spreading was Harry Hess. Harry Hess was a geologist. Part of his mission had been to study the deepest parts of the ocean floor. In 1946 he had discovered that hundreds of flat-topped mountains‚ perhaps sunken
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