santorini_g2344.jpg (Photo: Tom Pfeiffer)
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Walking & Study tours
: VolcanoDiscovery's signature tours for small groups: Discover volcanoes and volcanic areas from close with an expert in their field! These tours have a broad mix of activities and interests from photography, walking, study travel, nature & culture.
Nyamuragira volcano photos
: Africa's version of Mauna Loa, Nyamuragira (or Nyamulagira) is a massive basaltic shield volcano neighboring Nyiragongo. It is one of the most active volcanoes in the world and has voluminous eruptions every few years.
Divergent plate boundaries in oceans
: Two ocean plates move apart from each other. Hot upwelling mantle material forms magmas that continuously produce new oceanic crust. An ocean widens.