17 days volcano trekking This is one of our most exciting volcano tours! Halmahera, North Sulawesi and the Sangihe Islands are not only very scenic and interesting as well as nearly unspoiled by tourism, but also home to some of the country's most active (and often erupting) volcanoes, inclduing Dukono, Ibu, Lokon, Soputan and Karangetang.
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.
Colors of Iceland A world of surprising contrasts, incredible colors and natural impressions! Mighty waterfalls, hot pools and geysers, giant glaciers , ... Explore the variety of Iceland´s landscapes learn how they were formed through tectonic plates drifting apart and different types of volcanism.
Ibu volcano photos Ibu in Halmahera is one of the most active, but rarely visited volcanoes in Indonesia. A spectacular lava dome is growing inside the volcano's breached crater, with frequent explosions.