[Answer] The type of lava least likely to form a pyroclastic flow is _____.

Answer: basaltic

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The type of lava least likely to form a pyroclastic flow is _____. A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at velocities of 100 km/h (62 mph) on average but is capable of reaching speeds up to 700 km/h (430 mph). The gases and tephra can reach temperatures of … Lava is molten rock that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon.Magma is generated by the internal heat of the planet or moon and it is erupted as lava at volcanoes or through fractures in the crust usually at temperatures from 800 to 1 200 °C (1 470 to 2 190 °F).The volcanic rock resulting from subsequent cooling is also often described as lava . A lahar (/ ˈ l ɑː h ɑːr / from Javanese: ꦮ꧀ꦭꦲꦂ) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material rocky debris and water. The material flows down from a volcano typically along a river valley.. Lahars are extremely destructive: they can flow tens of metres per second they have been known to be up to 140 metres (460 ft) deep and large ... There are several mechanisms that can produce a pyroclastic flow: More items... Pyroclastic flow - Wikipedia Volcanic rock - Wikipedia A second hot welded block and ash flow erupted off the face of an advancing lava dome into the Lillooet River valley forming a pyroclastic dam at least 100 m (330 ft) high. This block and ash flow deposited irregularly welded monolithologic and vitophyric breccia that ranges from 100 m (330 ft) thick at Keyhole Falls to 15 m (49 ft) thick ... Pyroclastic rocks (derived from the Greek: πῦρ meaning fire; and κλαστός meaning broken) are clastic rocks composed of rock fragments produced by explosive volcanism and erupted as individual particles. T...

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