Mexico's Popocatépetl is an example of what volcanologists call a stratovolcano*, with a well-formed conical shape and a crater/vent at the top of the volcano. You can see that shape in the ...

Julie is with us on the scoria-strewn hillside at Red Rock, 12km north of Colac, to explain how these volcanoes formed – and where the next ones might appear. “The magma here – molten rock from ...

The Veyo Volcano and the Santa Clara Volcano are extinct, said recently retired BYU geology professor Eric Christiansen, but the region has the potential for more volcanic activity.

For this purpose, the team deployed a 1.3-kilometre-long fibre-optic cable a good 20 centimetres deep in a scoria layer on the volcano Etna at a distance of about 2 kilometres from the summit ...

Scoria volcanoes are much more spectacular. Blasts of escaping gas spout out huge glowing fountains of frothed-up lumps of lava. It accumulates around the vent, producing cones.

For this purpose, the team deployed a 1.3-kilometre-long fibre-optic cable a good 20 centimetres deep in a scoria layer on the volcano Etna at a distance of about 2 kilometres from the summit ...

Dating back even further, a Mesoamerican temple in the shape of a volcano (a scoria cone) can be found hiding within coastal Peru. First constructed during the Late Formative Period ...

Recording geologic observations at the summit of a scoria cone near Campo Oeste. Cliff in background exposes volcanic strata of the southern shield volcano on Guadalupe Island. Left to right: Daniel ...

Volcanoes are natural laboratories in which chemical processes are conducted on a ... scoria, lapilli, and ashes, have been carefully studied, but their gaseous products are less easily ...

Instead, come with me to Cerro Negro, one of the most active volcanoes in Central America, and the best place in the world to go volcano boarding. Technically a scoria cone – a type of volcanic ...

Lava fountains at Hawaii's Kīlauea volcano soared over 1,000 feet during a dramatic eruption captured by the U.S. Geological Survey. Episode 23 of the ongoing summit eruption saw both the north ...