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What erupts through the valley of the mid ocean rig?
Magma erupts along mid ocean ridges forming new ocean floor. Mid ocean ridges are found at divergent boundaries where two ocean plates are pushing apart.
What are the steps in the process of sea-flooring?
The sea-floor spreading begins at the mid-ocean ridge, which forms along a crack in the oceanic crust. Along the ridge, molten material that forms several kilometers beneath the surface, rises and erupts. At the same time, older rock moves outward on both sides of the ridge. As the molten material cools, it forms a strip of solid rock in the center of the ridge. When more molten material flows into the crack, it forms a new strip of rock.
What are the steps in process of sea floor spreading?
The sea-floor spreading begins at the mid-ocean ridge, which forms along a crack in the oceanic crust. Along the ridge, molten material that forms several kilometers beneath the surface, rises and erupts. At the same time, older rock moves outward on both sides of the ridge. As the molten material cools, it forms a strip of solid rock in the center of the ridge. When more molten material flows into the crack, it forms a new strip of rock.
How is pillow lava evidence of sea-floor spreading?
Pillow lava forms when molten lava erupts underwater and cools rapidly, creating characteristic pillow-like structures. This type of lava is commonly found along mid-ocean ridges, which are areas where sea-floor spreading occurs. The presence of pillow lava on the ocean floor is evidence of volcanic activity associated with sea-floor spreading.
What happens when new basalt forms along mid ocean ridges it?
The molten material then spreads out, pushing the older rock to both sides of the ridge. As the molten material cools, it forms a strip of solid rock in the center of the ridge. Then more molten material flows into the crack. The material splits apart the strip of solid rock that formed before, pushing it aside.
What happens to erodent material when transported along a river?
Typically the fragments are worn into rounded shapes.
What erupts from a volcano along with lava?
ash particles, cinders, tephra, gases
What happens after magma erupts along mid ocean?
The magma spills over the ridge and pushes the old sea floor away toward a subduction zone where the old sea floor melts.
What part of the earths interior is spewed out during a volcanic eruption?
Which part of the Earth's interior is spewed out in a volcanic eruption?
Where a earthquake happen?
Along subduction zones or boundaries. Or places with a active volcano near them because sometimes when a volcano erupts, or when it almost erupts, the pressure underground could release an earthquake.
True or false Mountains that begin when molten material reaches Earth and surface through a weak area of crust are fault-blocked mountains?
False. Mountains that begin when molten material reaches Earth's surface and then cools and solidifies are known as volcanic mountains. Fault-blocked mountains are formed when tectonic forces cause the Earth's crust to be uplifted and tilted along faults.
How do the differences in density and temperature provide some of the force needed to cause seafloor spreading and subduction?
Temperature differences in the mantle cause convection currents. These currents cause molten rock to erupt through the valley that runs along the center of the midocean ridge. As more material erupts, the sea floor spreads, cools, and becomes denser. The denser material sinks back into the mantle when it reaches a trench.
