Sentences with phrase «formed during a volcanic eruption»
Tenerife is an island formed during a volcanic eruption which created a dry and rocky landscape with large mountains.
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Layered volcanic rocks in Eastern Greenland that are up to 4 miles thick were formed during ancient volcanic eruptions that caused a global warming event called the Palaeocene - Eocene Thermal Maximum (PETM).
The material, they believe, was recycled as older volcanic rocks forming the roofs of magma chambers collapsed and remelted during eruptions, only to be reejected in the next volcanic outburst.
But in a new study researchers have shown conclusively that a new form of low - energy lightning is also active during eruptions, arcing between particles as they exit the volcanic vent at around 100 metres per second.
They form through the collapse of subterranean magma reservoirs during volcanic eruptions.
Fine particles created during powerful volcanic eruptions, such as Mount Tambora in 1815, Mount Krakatau in 1883, and Mount Pinatubo in 1991; can spread out high above the ground, forming an invisible, umbrella - like shield that blocks some of the incoming solar radiation and causes temporary global cooling.