Cinder cone volcano eruptions are like a hybrid between a shield and composite eruption, though the characteristics are more similar to the shield volcano. Like a shield volcano, cinder cone volcanoes feature basaltic lava. However, their lava is slightly thicker. This allows for the trapping of ...
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A volcanic pipe is the channel bored through the earth's crust that allows molten material from amagmachamber deep below the surface to travel up and out during a volcanic eruption. The entryway for magma into the pipe is called a vent, which ends in the depression called acrater. Lava, ...
Scientists have been monitoring a build-up of magma some three miles underground. Here is what we know about when an eruption might happen. When could the volcano erupt? The probability of the volcano erupting at Fagradalsfjall in the coming days is “high”, according to the Icelandic Meteo...
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the force projects material and gas over a large distance and creates powerful flows of superheated ash, lava and mud that can completely reshape the environment around the mountain. The eruption of Mount St. Helens in 1980 was a Plinian eruption, and actually blew out the side of the mountai...
The presence of certain gases near the surface can also indicate that a volcano is near eruption. Lava flowing into ocean water creates an acidic, steam-like cloud called a laze, short for “lava haze.” Sulfur dioxide can combine with other chemicals and gases to create volcanic smog ...
spewed from its chamber through the main vent. Lava, rocks, ash and other debris shoot out or roll over the volcano’s sides. The volcano’s actual structure accretes over time. After each eruption, the lava and other volcanic material cools around the volcano and creates a hard layer of...
Composite Volcano Examples Lesson Summary Frequently Asked Questions How does a stratovolcano form? Tectonic plate movement causes the seismic activity that creates volcanoes and earthquakes. A stratovolcano then forms when layers of ash and lava pile up to create the cone and slopes of the volcano...