Sea Floor Spreading

Sea- story airing is the make in which the marine al-Qaeda is prolonged when two cases blend a dampen. As the plates move isolated, the rocks break and earn a crack between the plates. Earthquakes expire along the plate boundary. Magma rises by the cracks and seeps out onto the ocean storey requirement a long, thin, undersea volcano. Sea floor banquet 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 set up 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 ridgepole. The boundaries where the plates move apart are constructive because new incrustation is being make and added to the ocean floor. The ocean floor gradually extends and thus the size of these plates increases. As these plates get bigger, others become small as they melt put up into the Earth in the process called subduction. The new rock at the edge has no sediments like the common sense 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 more 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 serious essay, order it on our website: BestEssayCheap.com

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