Add Yahoo as a preferred source to see more of our stories on Google. Researchers obtained cylindrical core samples from almost 3,000 feet -- nearly a kilometer -- within the seafloor. Erick ...

Volcanic ash is formed from minerals trapped in a silicate glass, as shown here under a microscope. Reactions with gases from the volcanic plume and atmosphere also form salt crystals on the ash ...

Nishinoshima Island, located in the Ogasawara Islands of Japan, is home to an active volcano. Ash from volcanic eruptions there in 2020 could have led to a temporary surge in phytoplankton levels in ...