Volcanic Eruptions

To describe pyro clastic material and lava flows.

Violent eruptions

Violent eruptions occur when Felsic lava of continental volcanoes cool off and get sticky. The Felsic lava contains water vapor, carbon dioxide, and tons of trapped gases. Eventually the gases will dissolve and once the volcano erupts and the solid particles shoot in the air, then the felsic lava explodes and throws out Pyroclastic materials in the air.

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Quiet Eruptions

Quiet eruptions form the Mafic Magma. Because the magma has low viscosity, the gases escape from the mafic magma. According to others the eruptions from the oceanic volcanoes are likely to be a quiet eruption.

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CSAV Hawaii: Pahoehoe Lava Vertical Drop, Kilauea Volcano

Pyroclastic Materials

There's about five major Pyroclastic Materials that are the Volcanic Bombs, Volcanic Ash, Lapilli, and Volcanic Dust.

  • Lapilli are large particles that are less than 64mm in diameter and they fall near the vent. Lapilli is Latin for "little rocks," which is material that falls out of the air during a volcanic eruption.
  • Volcanic Bombs are pyroclastic particles because when the eruption of volcanoes occur, large clots of hot lava are thrown into the air, after it cools down it forms a round shape.
  • Volcanic Ash are pyroclastic particles that is about 2mm in diameter and anything less 0.25mm in diameter is considered Volcanic dust. Also, it's formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently into the atmosphere.
  • Volcanic Dust and ash surround the volcano immediately once it settles on land. Some small dust particles can sometime travel through the earth in the upper atmosphere. In other words, Volcanic Dust are sand-size particles of igneous rock material that been blown into the air by an erupting volcano.
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