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.
1-3 day excursions If you're interested in volcanoes, there are a number of excursions you should not miss if you're in the area: hike to the craters of Stromboli volcano, climb Etna volcano, get to know the unique volcanic history of Santorini - some examples of shorter (1-3 days) tours and excursions we offer.