Question: What Is The Average Speed Of Seafloor Spreading?

Which ocean is growing the fastest?

East PacificThe oceanic crust is moving away from the East Pacific Rise to either side.

Near Easter Island the rate is over 150 mm (6 in) per year which is the fastest in the world..

Which ocean is shrinking in size?

Pacific OceanSeafloor spreading is when tectonic plates split from each other, creating a new oceanic crust. While the Pacific Ocean is slowly shrinking, the Atlantic Ocean is expanding.

Is seafloor spreading good or bad?

Mid-ocean ridges and seafloor spreading can also influence sea levels. As oceanic crust moves away from the shallow mid-ocean ridges, it cools and sinks as it becomes more dense. This increases the volume of the ocean basin and decreases the sea level.

What is the average rate of seafloor spreading in the Atlantic Ocean?

a 2 ft per yearA typical rate of seafloor spreading in the Atlantic Ocean is a 2 ft per year b | Course Hero. You can ask !

Where is seafloor destroyed?

You are correct that the seafloor is destroyed at subduction zones, but it is simultaneously being created at mid-ocean ridges. see figure 1 . Figure 1: Seafloor spreading at a mid-ocean ridge(where new crust is being created) and it’s destruction at a subduction zone.

How do you calculate average rate of seafloor spreading?

It is possible to calculate the spreading rate of one side of a mid-ocean ridge by dividing distance by time (Distance/Time = Rate). This is called a half-spreading rate. Multiply it by 2 to get the full spreading rate for both sides of the ridge.

What is the fastest spreading center?

Fernandez microplate, has the world’s fastest spreading rate and tectonics dueling ridge propagation. … survey, together with other geophysical data collection, was conducted aboard the R/V.Melville covering an approximately 5 ° by 5 ° area centered on this part of EPR.More items…•

What is the theory of seafloor spreading?

Seafloor spreading, theory that oceanic crust forms along submarine mountain zones, known collectively as the mid-ocean ridge system, and spreads out laterally away from them. …

How do you calculate cm per year?

Use the formula (island distance from hotspot ÷ island age) to calculate the rate of movement for 1. each island in the chart, then multiply by . 1 to convert from kilometers per million years to centimeters per year.

Where is the fastest rate of seafloor spreading?

The fastest present-day seafloor spreading, ~150 km/Myr, occurs along the Pacific-Nazca boundary between the Easter and Juan Fernandez microplates.

Why is the Pacific spreading faster than the Atlantic?

Faster spreading ridges like the northern and southern East Pacific Rise are “hotter,” meaning more magma is present beneath the ridge axis and more volcanic eruptions occur. Because the plate under the ridge crest is hotter scientists think that the plate responds to the divergent spreading process more fluidly.

What type of plate boundary is the oldest crust on Earth near?

The oldest parts of the oceanic crust are found farest from the mid ocean ridges at subduction zones and continental shelves.

What are the 4 steps of seafloor spreading?

Terms in this set (7)Magma comes out of the rift valley.Magma cools to rock and hardens.Rock is pushed away as new rock is formed at MOR.Oceanic crust and continental crust meet at the trench.Oceanic crust bends down under the continental crust.Gravity pulls rock towards mantle.Rock melts to mantle.

Where is active seafloor spreading occurring today?

Where is active sea floor spreading occurring today? Seafloor spreading is the movement of old rock that is being pushed by the new young oceanic crust. This would be a divergent since the plates are separating from each other. Active seafloor spreading is occurring at mid-ocean ridges.

Why is seafloor spreading important?

Significance. Seafloor spreading helps explain continental drift in the theory of plate tectonics. … At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed. Hydrothermal vents are common at spreading centers.

Which mid ocean ridge is spreading the slowest?

The Ridge is named after him, and the name was recognized in April 1987 by SCUFN (under that body’s old name, the Sub-Committee on Geographical Names and Nomenclature of Ocean Bottom Features). The ridge is the slowest known spreading ridge on earth, with a rate of less than one centimeter per year.

Which is a result of seafloor spreading?

Sea-floor spreading is what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another resulting in spreading of the sea floor. As the plates move apart, new material wells up and cools onto the edge of the plates.

What are the three types of seafloor spreading?

There are three types of plate-plate interactions based upon relative motion: convergent, where plates collide, divergent, where plates separate, and transform motion, where plates simply slide past each other.