Earthquakes and Volanoes

-Amrita
Volcanoes and earthquakes are seemingly very different geological events, insofar they are actually closely related two go forth from movements of Earths crust. Earths crust the lithosphere is composed of several major plates and many an mated(prenominal) minor plates that change shape and position. Over time, these tectonic plates move, act with each other, and are responsible for the formation of ocean basins, portion ranges, islands, volcanoes, and earthquakes.
The theory of plate tectonics is relatively new. In the advance(prenominal) 1900s, Alfred Wegener first developed a theory of continental barf based on a collection of evidence that showed touch similarities in rocks and fossils found on continents separated by spacious distances. Sometime later, Arthur Holmes proposed a mechanism to explain how the continents could have move across Earths surface. He proposed that circular convection currents of molten material of late within Earth could provide ample force to dissever and move continents. By the late 1960s, evidence of seafloor spreading helped to swear the now well-accepted theory of plate tectonics.
Three main types of boundaries personify between tectonic plates. The first, called a divergent boundary, occurs most much at mid-oceanic ridges.



Here, two plates move away from each other, forming a break, or rift, in Earths crust. Magma from the mantle rises to fill the gap, creating new crust. The flash type, called a convergent boundary, occurs where two plates moving toward each other meet. If at least one of the plates is made up of relatively dense oceanic crust, the denser of the two plates subducts, or lantern slides beneath the other. If both plates are made up of continental crust, very micro subduction occurs. Instead, the plates buckle and fold to create valleys, ridges, and high mountain ranges. The expiry type of boundary is called a transform boundary. At these locations, plates slide roughly alongside each other in opposite directions. The plates often get stuck as...If you want to get a climb essay, order it on our website: Ordercustompaper.com



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