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A lava flow is simply a flow of liquid rock down a slope that usually results from an effusive eruption. A pyroclastic flow is an avalanche-like flow of hot ash, rock and gas that moves down a volcano during an explosive eruption, The move much faster than lava flows and are far more dangerous.
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What is the term for lava flow that travels downhill at over 100mph?
Pyroclastic flow
Does Krakatoa produce lava or pyroclastic flow?
Yes, of course Krakatoa has a pyroclastic flow. Every volcano has an pyroclastic flow, which can travel up to at huge speeds. Krakatoa's pyroclastic flow raced an amazing 200 mph over 20 miles of open sea. Yes Krakatoa has pyroclastic flows but not all volcanoes produce pyroclastic flows, only Mt. St. Helens type volcanoes usually composed of andesite. Kilauea for example does not produce pyroclastic flows because it is composed of basalt, the lava flows out easily.
What type of lava is least likely to form a pyroclastic flow?
Pahoehoe lava, which has a low viscosity and flows more easily, is less likely to form a pyroclastic flow compared to a'a lava, which is more viscous and tends to fragment into pyroclastic material when flowing.
What is the difference between pyroclastic flows and lava flows?
Lava is molten rock at earth's surface. A pyroclastic flow is an avalanch-like flow of hot ash, rock, and gas that moves down a volcano's flanks at great speed.
Is pahoehoe considered pyroclastic debris?
No, pahoehoe lava is not considered pyroclastic debris. Pahoehoe is a type of basaltic lava that has a smooth, rope-like texture due to its low viscosity. Pyroclastic debris refers to fragmented material such as ash, volcanic rocks, and gases that are blasted out of a volcano during an explosive eruption.
