How are magnetic stripes near mid-ocean ridges evidence for seafloor spreading?

How are magnetic stripes near mid-ocean ridges evidence for seafloor spreading?

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.

What is magnetic striping on the seafloor?

What Is Magnetic Striping? Magnetic Striping is when the sea floor is spreading, and magma from the mantle is rising through the Earth’s crust. That magma then turns into new crust, forming the “Oceanic Crust”.

What causes magnetic stripes on the seafloor such as those shown here?

When lava gets erupted at the mid-ocean ridge axis it cools and turns into hard rock. This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges. These patterns of stripes provide the history of seafloor spreading.

What causes magnetic stripes on the seafloor as discussed in class?

The specific magnetism of basalt rock is determined by the Earth’s magnetic field when the magma is cooling. Scientists determined that the same process formed the perfectly symmetrical stripes on both side of a mid-ocean ridge. The continual process of seafloor spreading separated the stripes in an orderly pattern.

Why does magnetic striping occur?

The striped magnetic pattern develops because, as oceanic crust pulls apart, magma rises to the surface at mid-ocean ridges and spills out to create new bands of ocean floor. Later, after the planet’s magnetic field flips again, the next stripe of new ocean floor aligns its polarity in the opposite direction.

What is magnetic striping?

Magnetic Striping is when the sea floor is spreading, and magma from the mantle is rising through the Earth’s crust. That magma then turns into new crust, forming the “Oceanic Crust”.

What creates magnetic stripes on the seafloor quizlet?

Evidence from magnetic stripes is found on the seafloor. The magnetic stripes are created by the reversal of Earth’s magnetic field. Subduction happens near trenches so the sea-floor can be melted and solidified again.

What occurs at mid-ocean ridges quizlet geology?

A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.

What causes magnetic stripes on the seafloor quizlet?

Why does the rock of the ocean floor have a pattern of magnetic stripes? The rock of the ocean floor contains iron. As molten material cooled and hardenend, the iron bits inside lined up in the direction of Earth’s magnetic poles, creating a pattern of magnetized stripes.

Where does magnetic striping occur?

What are mid-ocean ridges?