Divergent Boundary Also known as spreading boundary, a divergent boundary occurs where two plates move apart, allowing magma, or molten rock, to rise from the Earth's interior to fill in the gap.

At divergent boundaries in the oceans, magma from deep in the Earth's mantle rises toward the surface and pushes apart two or more plates. Mountains and volcanoes rise along the seam.

When they grind past each other, it's called a transform plate boundary, which can cause earthquakes. When they move away from each other, it's known as a divergent boundary, where lava spews out ...

With the August 23, 2011 earthquake on the East coast of the United States, the internet has been a-buzz. We had quite the interesting discussions, behind closed doors, here at GeekMom. GeekMoms ...

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 ...

New crust is continually being pushed away from divergent boundaries (where sea-floor spreading occurs), increasing Earth's surface. But the Earth isn't getting any bigger. What happens, then, to ...