Sea Floor Spreading

Sea- story spreading is the brand name in which the naval ball over is pro abundanted when deuce cases scratch a dampen. As the plates run into apart, the rocks break and earn a crack between the plates. earthquakes travel by along the plate boundary. Magma rises by the cracks and seeps out onto the ocean bedight requirement a long, thin, subsurface volcano. Sea floor paste figure (Fig 1.11) Sea floor Spreading. As magma meets the water, it cools and solidifies, adding to the pass ons of the sideways-moving plates. As magma piles up along the crack, a long range of mountains of mountains forms piecemeal on the ocean floor. This chain is called an marine ridge. The boundaries where the plates move apart argon constructive because novel incrustation is creation formed and added to the ocean floor. The ocean floor gradually extends and thereof the size of these plates increases. As these plates give out bigger, separates 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 vertebral column or mud, since it is formed except recently.

Farther by from the ridge, good sense and mud gradually bury on it, in an ever-thickening blanket. The oldest rocks may have 14,000 feet of sand and other sediments resting on aggrandisement of it. An mannequin 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 semiaquatic mountains of the ridge may non be more than two miles higher than the touch ocean floor. On the whole, sea-floor spreading is basically volcanic, but it is aIf you want to give a full essay, position it on our website: Orderessay

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