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Earth's System: Force of the Earth: Volcanoes and Earthquakes
Types Of Lava Flows
Description
Types Of Lava Flows
Lava is molten rock that reaches Earth’s surface during a volcanic eruption. The way it flows depends on its temperature, gas content, and chemical composition, especially how much silica it contains. There are three main types of lava flows: pahoehoe, a smooth, ropy flow; ‘a...
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Transcript
Lava is molten rock that flows out of a volcano during an eruption, and its movement depends on its composition.
If the lava is thick and blocks the vent, it can trap gases and cause pressure to build up.
When this pressure is released, it can explode and throw out solid pieces of rock called pyroclasts.
Lava that flows without...
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