Press "Enter" to skip to content

What is happening on the ocean floor when plates diverge?

What is happening on the ocean floor when plates diverge?

At divergent boundaries, the sea floor spreads apart on both sides of the mid-ocean ridges, and magma wells up from the mantle to add new crust to fill the gap. As a result, the ocean floor moves like a conveyor belt, carrying the continents along with it.

What was happening to the ocean floor according to Harry Hess?

The theory also explained Hess’s puzzling guyots. They are believed to be once-active volcanoes that rose above the surface like modern-day island arcs and then were eroded to sea level. As the ocean crust spread away from the higher ocean ridges, the guyots sank below sea level, becoming completely submerged.

How is the ocean floor destroyed?

Framework Integration: Themes: Patterns of change: over time, new sea-floor is created by the upwelling of magma at mid-ocean spreading centers; old ocean floor is destroyed by subduction at deep sea trenches.

What happens to the ocean floor as the plates move?

In this way, as the plates move further apart new ocean lithosphere is formed at the ridge and the ocean basin gets wider. This process is known as “sea floor spreading” and results in a symmetrical alignment of the rocks of the ocean floor which get older with distance from the ridge crest. Loading the player …

Where does the expansion of the Atlantic Ocean occur?

The research, published in the journal Nature, suggests the key to the Atlantic’s expansion lies beneath a large underwater mountain range in the middle of the ocean. This set of undersea peaks is known as the Mid-Atlantic Ridge, and it separates the North American plate from the Eurasian plate, and the South American plate from the African plate.

Why is the seafloor spreading in the Pacific Ocean?

Seafloor spreading is when tectonic plates split from each other, creating a new oceanic crust. This process gradually pushes tectonic plates apart and occurs at underwater mountain ranges called mid-ocean ridges. A younger crust is less dense than an older crust.

Why is the Atlantic Ocean getting wider every year?

The tectonic plates under the Americas, Europe, and Africa are being pushed apart as the Atlantic Ocean widens year by year. New research reveals what’s pushing the plates apart: Material from deep within the Earth is bursting upward at an undersea ridge in the middle of the Atlantic. The Atlantic Ocean grows 1.5 inches wider every year.