Sentences with phrase «hot pyroclastic»
«The magma that originally erupted from the supervolcano had about 1,400 ppm lithium in it,» said Benson, describing a red - hot pyroclastic flow of pumice, ash, crystals, and rock that spread for 50 miles in all directions.
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The entire cliff would have been deposited very quickly from a fast - moving current of hot gas and ash (a pyroclastic density current), and the extreme temperatures (900-1000 °C) caused the ash to weld to the ground and effectively enameled the area in dense volcanic glass.
One possibility is that the eruption column of hot volcanic ash, gas and rock fragments now extending into the sky above the summit could collapse into what's called a pyroclastic flow and race down the flanks of the mountain.
According to Babad Lombok, records of the island written on palm leaves in Old Javanese, Samalas erupted catastrophically before the end of the 13th century, devastating surrounding villages — including Lombok's capital at the time, Pamatan — with ash and fast - moving sweeps of hot rock and gas called pyroclastic flows.
After a wave of hot gas and ash, called a pyroclastic flow, engulfed nearby Pompeii and killed those left in the city, more layers of ash from the eruption buried the buildings and bodies.
Volcanologists warn that the main hazards of a large eruption are hot and fast - moving avalanches of rocks, dust and gas that can not be outrun, known as pyroclastic flows, as well as mudflows and ashfall.
Worst possible scenario involves pyroclastic flows — currents of hot gas and rock moving at 70 miles per hour
It also involved a pyroclastic flow - a dangerous fast - moving hot cloud of gas, ash and volcanic matter.
The largest of them occurred in the late 6th century, and is believed to have generated pyroclastic flows — that of hot gas, ash and rocks blown out of a volcano — reaching at least 50 kilometers from Rabaul.