What be dwelling margins? Plate margins are the edges of the plates, where all the powerfulness of disposition is released in countryquakes and volcanoes. There are three primary(prenominal) characters of plate margins: - Spreading Boundaries There are devil tokens of dissemination boundary Ridges, where young rock is formed, push the plates apart, and Rift, where the plates pull apart, and the earth between them sinks. On the ocean floor the plates are spreading. whole along the mid ocean ridge, volcanic action at law is pouring new lava out onto the seabed. As it hardens, it becomes new rock, plotmeal pushing the archness, on either side of it away. Another pillow slip of spreading boundary is the African Rift Valley. As the 2 plates are moving apart, the earth between them is becoming stretched. As it stretches it sinks, because it is thinner. It is a little bit like taking a component part of gum, and stretching it out. The pieces in your fingers stay thick, but the piece in the middle gets thinner and thinner, as it is stretched. meet Boundaries Converging (coming together) Boundaries, are where two plates are banging into each other. What happens when they collide depends on the type of plate they are. In a subduction geographical zone one plate is world pushed beneath the other.
It happens when a lighter plate hits a thick plate. The lighter plate is pushed chthonic the heavier one. This often happens where continents meet the ocean. As the lighter ocean crust is forced downwards, it takes urine with it. The water causes the rock to melt at degrade temperatures than normal. The pressure inside(a) the earth is much greater than at the surface, it increases the deeper you go! . The new molten rock tends to rise to the area of lower pressure, sometimes forming... If you indispensableness to get a full essay, pronounce it on our website:
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