Constructive Boundaries

What are constructive plate boundaries also known as?

Divergent plate boundaries.

What occurs at oceanic-oceanic boundaries?

Two bits of oceanic crust separate, leading to the formation of volcanic activity and new crust along the boundary.

What causes magma to escape from the mantle at oceanic-oceanic boundaries?

The lithosphere becomes thinner and experiences lower pressure, which allows the magma to melt and rise.

What are transform faults?

Sections of the crust that move side by side along a plate boundary, generating friction and earthquakes.

What is an example of a location with oceanic-oceanic boundary processes?

The Mid-Atlantic Ridge.

What geological feature forms at continental-continental boundaries?

Rift valleys.

What happens to the continental crust at a hot spot?

It can be forced upwards, causing cracks and potential volcanic activity.

How do rift valleys form?

Continental crust subsides as it is pulled and stretched in two directions, creating a sunken area.

What is an example of a location where continental crust is separating?

The East African Rift Valley.

What type of geological activity occurs as the plates separate at rift valleys?

Volcanic activity and the creation of lakes in the valley floor.

How do new oceanic crusts form over time as continental crust separates?

Continental crust can eventually sink, leading to the creation of a new oceanic crust in the gap.

What is the relationship between oceanic and continental crust separation in terms of plate boundaries?

The separation of continental crust can ultimately lead to the formation of oceanic crust.