Cinder cones are simple volcanoes that form where vents, or openings, spit out ash and lava. They can be cone- or oval-shaped, usually with a bowl-like crater at their summits. When a cinder cone ...

The recent swarm of earthquakes is the most significant activity from the volcano since this eruption, IMO representatives said. Bárðarbunga is a stratovolcano — a type of cone-shaped volcano ...

Etna is one of the world's most active "stratovolcanoes;" these are cone-shaped volcanoes, built up by alternating layers of lava and erupted rock fragments, that are characterized by explosive ...

That feature is Athabasca Valles, a system of valleys carved into volcanic plains ... the processes that shaped this enigmatic Martian landscape. "Rootless cones form when lava flows over wet ...

A volcano near Anchorage, Alaska, called Mount Spurr, has been rumbling. As a result, the U.S. Geological Survey and Alaska Volcano Observatory issued an alert. This indicates that the volcano, which ...

Augustine Volcano showing the typical cone shape, erupting ash cloud, and pyroclastic flows on the snow covered slopes (Photo by U.S. Geological Survey). Click image for a larger view. Along the ...

Criterion (viii): Sangay (a perfect cone-shaped volcano) is notable globally for its long period of continuous activity. The area exhibits a rugged topography with deep, steep-sided valleys, abundant ...

In the high desert of north-central New Mexico, a 40-minute drive west of Santa Fe, a surreal landscape of eroded volcanic ...

Vents may consist of a single, circular-shaped structure ... Hundreds of dikes can invade the cone and inner core of a volcano, as they do in Nyiragongo, often along zones of structural weakness.

The Philippine Institute of Volcanology and Seismology maintained the alert level around the Mayon volcano at 3 on a scale of 5. The cone-shaped volcano continues to pose a threat to residents ...