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Seafloor spreading: Seafloor spreading, theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.

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Seafloor spreading: Seafloor spreading, theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.

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Seafloor spreading: Seafloor spreading, theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.

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Britannica, The

Editors of  Encyclopaedia.
“Seafloor
Spreading.”
Encyclopædia
Britannica,
ylopædia
Britannica, Inc.,
15 Dec. 2017,
www.britannica.com/science/seafloor-spreading.

National Geographic
Society. “Seafloor Spreading.” National Geographic Society, 9 Oct. 2012, www.nationalgeographic.org/encyclopedia/seafloor-spreading/.

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The African and the Arabian plates are tearing away from each other. Geologists explain that eventually Eastern Asia and North Africa will be completely separate. Then the Red and Mediterranean sea will be joined together as one.

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It was first discovered shortly after World War Two was over. Vessels took profiles of the ocean floor and found out that there was continuing to be new rock in between older rock. Which is from the new magma flowing into the crack and hardening into basalt rock. The rock is heavily magnetic also which didn't make it very unnoticeable. Now it is known and I key piece to plate tectonics.

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How It Helped Build On Continental Drift

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How It Helped Build On Continental Drift

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It helped build on continental drift because scientists noticed that the marks in the rock started to move away and new rock was created in between. Also the levels of the Seafloor changed. This was a major clue that led to the plates moving.

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How Seafloor Spreading Helped Build On Continental Drift

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How Seafloor Spreading Helped Build On Continental Drift

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This helped prove continental drift because scientists noticed that the marks in the rocks were moving over and that there was new rocks in between. This was an obvious sign that the plates move and effect the crust. The crust including oceanic crusts.

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It was first proposed by Harry H. Hess, a geophysicist who spread the hypothesis in 1960 and it was later confirmed

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Seafloor spreading is caused by divergent plate boundaries. Divergent plate boundaries are when plates move away from the other plate and cause a gap which is then filled with magma creating an igneous rock. This causes the Seafloor to expand and get better due to the gain in rock. Although this does not expand the world. Therefor the Seafloor is constantly growing.

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Seafloor spreading is caused by divergent plate boundaries. As tectonic  plates slowly repel from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less dense material rises, often causing a mountain or a higher area on oceanic floor. Therefor, as the plates move apart a gap is created where magma flows in. It then cools and creates new rock. As you move farther away from the gap on either side the rock is older and older. The ages are mirrored on both sides.-National Geographic

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What would happen to the Earth if magma never flowed into the gaps?
Mind;