Sentences with phrase «pyroclastic ash»

The island is formed from a cluster of eighteen lava domes, with rhyolite and pyroclastic ash deposits.

Those glimpses of the surface revealed deposits of pyroclastic ash — the telltale signs of volcanic explosions — peppering the planet's surface.

Not exact matches

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.

They examined 130 outcrops on the flanks of the volcano, exposing sequences of pumice — ash hardened into rock — and other pyroclastic material.

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.

The combined effects of pyroclastic flows, volcanic ashes and tsunamis had disastrous results in the region.

«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.

The Pompeii and circumstance of billowing ash, earthquakes, flaming meteors, tsunami, and pyroclastic flow (look it up) finally adds some liveliness to otherwise steady genericalness, but the poignancy - free special - effects spectacle isn't insanely intense, as it should be, instead evoking green screens and video games.

It also involved a pyroclastic flow - a dangerous fast - moving hot cloud of gas, ash and volcanic matter.

Visually, over the last few days there is no eruption accompanied by bursts of ash and pyroclastic material with great pressure since 30/11/2017, but the seismicity is still high.

For 42 years, Arenal Volcano was Costa Rica's most active volcano with flowing lava and pyroclastic surges that blasted huge rocks and cauliflower - shaped ash clouds into the air.

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.

With the pyroclastic explosions came enormous amounts of ash, so it is presumed the eruptions may have first led to a drastic cooling.

Dr Kamata also points out that the ash, lava flow, and the entire picture of violence such as pyroclastic flow, and how the mountain body collapsed should be used for the prevention of future disasters, using the method of hazard maps.