Virunga Mountains

Photograph by Chris Johns

Lava spews out of a fissure in the Virunga mountains in the Democratic Republic of the Congo. The Virunga chain is part of the East African Rift Valley system, which marks the boundary between two plates: the Nubian plate to the west and the Somalian plate to the east. The rift valley is a classic example of a divergent plate boundary.

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