No. Although a pyroclastic eruption will produce toxic gasses, the pyroclastic material itself consists of sperheated ash, pumice, and rock fragments.
Pyroclastic flow is gas that result from water mixing with loose material on the steep sides of a volcano.
Pyroclastic flows are the most dangerous type of pyroclastic material. They are fast-moving currents of hot gas and volcanic debris that can reach speeds of over 100 mph and temperatures of up to 1,000°C. These flows can devastate everything in their path and are a significant hazard associated with explosive volcanic eruptions.
Water is not a form of pyroclastic material. Pyroclastic material refers to fragmented volcanic rocks, ash, and other debris expelled during volcanic eruptions.
No. Magma is molten rock that is beneath earth's surface. When it erupts it can form lava or pyroclastic material. Although pyroclastic material can form rocks, most rocks are not from pyroclastic material.
Some rocks are pyroclastic but most are not.
Pyroclastic material is more often felsic (acidic) or intermediate, but mafic (basic) pyroclastic material may also occur.
Mt Etna produces basaltic lava, which is low in silica and flows more easily. It also releases pyroclastic material, which is a mix of hot rock fragments, ash, and gas released during volcanic eruptions.
Yes. It is not uncommon for rhyolitic material to form pyroclastic flows.
Pyroclastic flow
A material, other than a gas, that is known to be so toxic to humans that it poses a health hazard during transportation, is a regulated hazardous material (dangerous good) in Division 6.1 Poisonous Material.
Poisonous gas is Division 2.3 in the DOT hazardous materials classification system.
A placard identifying hazard class 6 describes the presence of a poisonous gas. For an image, see the related link, below.