Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

One of the largest canyons in our Solar System carved its way through several layers of ancient volcanic eruption debris, a recent study reports. Valles Marineris is a titanic network of deep cracks ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Peridotite is composed mostly of greenish magnesium-iron-silicate ...

Most active volcanoes on Earth are dormant and are normally not considered hazardous. A team of volcanologists has devised a technique that can predict their devastating potential. The scientists used ...

Nick DiFrancesco can speak to the media about the geology of Earth, Mars and the Moon, as well as natural science education and outreach. His research involves the characterization of rocks and ...