Volcanic Eruptions

Describe pyroclastic material and lava flow

What is pyroclastic material?

Pyroclastic material is a fragment of rocks that form during a volcanic eruption. Felsic is a light color material very vicious it is made of silicon and feldspar felsic has more trapped gas that is why it has such a violent eruption.

Classified Mafic Lava Types

Mafic magma is a composer of magnesium and iron and those materials make pahoehoe lava, aa lava and blocky lava. Those types of lava make shield volcanoes. Mafic magma has less trapped gases and it is a dark colored magma that is why Mafic magma has such a quiet eruption.

Type of Volcano

Volcano Eruption Mount St. Helens May 18, 1980 USGS