In plate tectonics there are three types of boundaries; divergent boundaries, convergent boundaries and transform boundaries.
What are divergent boundaries?
Divergent boundaries occur when tectonic plates are moving apart. When tectonic plates move apart, new crust is formed because a space is created between the two tectonic plates. Divergent boundaries can create large fault zones in the oceanic ridge system.
Examples of divergent boundaries of tectonic plates
The Mid-Atlantic Ridge is a good example of a divergent boundary created by tectonic plates moving apart. East Pacific Rise and East African Great Rift Valley are other examples of divergent boundaries of tectonic plates.
Picture of Mid Atlantic Ridge in Iceland, example of divergent boundaries in plate tectonics.