What happens when tectonic plates split apart?

Answer 1

Initially a series of tensile structures (on continents) such as horst and graben will form. These are a series of downthrown crustal blockes surrounded on ether side by normal faults.

If the tensile stress continues, this will form a rift with the associated vulcanism. Ultimately this can form a new spreading centre creating a new ocean and mid oceanic ridge.

Answer 2

Plates Separate

The Mid-Ocean Ridge and rift valleys, such as the one that runs through eastern Africa, occur along boundaries where plates are spreading apart. New oceanic crust is created as the plates separate and molten rock rises up from the mantle and fills the space. The earthquakes and the volcanic eruptions along the Mid-Ocean Ridges are a direct result of this process.

There is also an island formed by the magma from the inner core that rises up to make tiny islands like Hawaii

Answer 3

An earthquake or tremor would occur.

no, actually a volcanic eruption would occur then there would be a volcano

Answer 4

When plates move apart, new crust forms from rising mantle material.

Answer 5

When two plates separate, it creates a rift valley

Answer 6

New crust forms from rising mantle material.

Answer 7

a rift valley which later turns into a mid ocean ridge when it covers a big area and fills with water.

Answer 8

when plate seperate the heavier one goes under neath