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Volcanic Ash Advisory Centres Much current eruption news is provided by the 9 Volcanic Ash Advisory Centres (VAAC) distributed around the globe. The VAACs provide a vital service for aviation safety.
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.
Photos from Armenia Armenia is a very photogenic country with a large variety of landscapes showing some very spectacular geology, century-old monasteries and castles, and much more.