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What observation has been about the age of the basalt that forms a mid ocean ridge?
New magma of basalt composition emerges at and near the axis because of decompression melting in the underlying Earth's mantle.
What else can I help you with?
How do strips of magnetized rock on the ocean floor provide evidence of sea-floor spreading?
Strips of ocean-floor basalt record the polarity of earth's magnetic field at the time the rock formed. These strips form a pattern that is the same on both sides of the mid-ocean ridge. the pattern shows that ocean floor forms along mid-ocean ridges and then moves away from the ridge.
What is the mid-ocean ridge?
The mid-ocean ridge is the Earth's longest continuous mountain range, approximately 55-65 thousand kilometers long and bilaterally divided by a valley called a rift. The mid-ocean ridge is a volcanic feature caused by the spreading apart of oceanic plates as part of plate tectonics. The sea floor at the ridges are uplifted by rising magma. The rising magma is part of a process of heat transfer from the interior of the Earth to the surface known as a convection current. As the rising magma cools, it forms new crust which becomes part of the ridge. Therefore, the ridge is composed of basalt and gabbro, and is among the most recent of geologic age crustal rock. :)
What is the gap that forms when a mid ocean ridge widens called?
The gap that forms when a mid-ocean ridge widens is called a rift zone or a divergent boundary. This is where tectonic plates are moving away from each other, causing magma to rise and create new crust.
Can plate movement occur when a plate is pushed away from an ocean trench during a process called ridge push?
Yes, plate movement can occur through a process called ridge push. As new oceanic crust forms at mid-ocean ridges, it pushes the neighboring tectonic plate away from the ridge due to the force of gravity, causing the plate to move away from the ridge. This movement is one of the driving forces behind the motion of tectonic plates.
What forms when lava comes out of cracks in the ocean floor?
A big pile of basalt is formed. In the mid Atlantic ridge basalt is constantly coming up and becoming the new ocean floor this is called a spreading center because pressure pushes the earths crust towards America, Africa and Europe where it is subducted, which means it goes back to where it came from as one plate(crust) slides under the other. There, in the dept the crust remelts and is eventually recycled back through a volcano to become solid earth again, this is termed the rock cycle.
What observation has been made about the age of the basalt that forms a mid ocean ridge?
New magma of basalt composition emerges at and near the axis because of decompression melting in the underlying Earth's mantle.
What is mid ocean ridge molten rocks made out of?
Basalt. Basalt - Wikipedia, the free encyclopedia
What is the color and the type of rock that forms oceanic crust at mid ocean ridges?
The color of rock that forms oceanic crust at mid-ocean ridges is usually dark gray to black. The type of rock is basalt, which is rich in iron and magnesium and forms from solidified lava.
What happens when new basalt forms along mid ocean ridges?
Magma that has bubbled up through the crack in the Earth's surface.
How do strips of magnetized rock on the ocean floor provide evidence of sea-floor spreading?
Strips of ocean-floor basalt record the polarity of earth's magnetic field at the time the rock formed. These strips form a pattern that is the same on both sides of the mid-ocean ridge. the pattern shows that ocean floor forms along mid-ocean ridges and then moves away from the ridge.
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.
Who first related the symmetrical magnetic patterns in seafloor basalt to seafloor spreading at a mid ocean ridge?
Vine and Matthews
Is ocean crust formed at a mid ocean ridge?
Yes, the process that creates oceanic crust on a mid-ocean ridge is called "seafloor spreading". seafloor spreading creates a new oceanic crust that forms on the mid-ocean ridge.
What forms at the center of the mid ocean ridge?
New oceanic crust.
A mid-ocean ridge forms at what type of plate boundary?
A mid-ocean ridge forms at the divergent plate boundary. This boundary initially forms rifts that later on become rift valleys.
What type of plate boundary form a mid ocean ridge?
A mid-ocean ridge forms at the divergent plate boundary. This boundary initially forms rifts that later on become rift valleys.
What causes material to form at a mid-ocean ridge on the ocean floor?
New material forms on the ocean floor of the mid-ocean ridge due to plate tectonics and volcanic activity. Volcanic eruptions deposit cooled magma on the ocean floor.
