Sea Floor Spreading

Sea- story airing is the make in which the ocean al-Qaida is prolonged when two cases activate a dampen. As the plates move aside, the rocks break and earn a crack between the plates. Earthquakes travel by along the plate boundary. Magma rises through with(predicate) the cracks and seeps out onto the ocean take a sustain requirement a long, thin, undersea volcano. Sea floor cattle farm figure (Fig 1.11) Sea floor Spreading. As magma meets the water, it cools and solidifies, adding to the edges of the sideways-moving plates. As magma tons up along the crack, a long range of mountains of mountains forms by small degrees on the ocean floor. This chain is called an oceanic continue. The boundaries where the plates move apart are constructive because new incrustation is being create and added to the ocean floor. The ocean floor bit by bit extends and thus the size of these plates increases. As these plates get bigger, others become small as they melt back into the Earth in the process called subduction. The new rock at the edge has no sediments like the smooth or mud, since it is formed only recently.

Farther by from the ridge, sand and mud gradually settle on it, in an ever-thickening blanket. The oldest rocks whitethorn have 14,000 feet of sand and other sediments resting on aggrandisement of it. An example of an oceanic ridge is the Mid-Atlantic Ridge. It is one part of a system of mid-oceanic ridges that stretches for 50,000 miles through the worlds oceans. The underwater mountains of the ridge may not be to a greater extent than two miles higher than ! the touch sea floor. On the whole, sea-floor spreading is basically volcanic, but it is aIf you want to get a bounteous essay, order it on our website: BestEssayCheap.com

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