Volcanic Eruptions

Describe pyroclastic material and lava flows

What is pyroclastic material ?

Pyroclastic Material is fragments of rock that form during a volcanic eruption. Pyroclastic material is made out of Felsic Magma. Felsic magma is made out of silicon and feldspar,which makes it a light colored. Felsic magma is more viscous and gets more trapped gases which makes it a violent eruption.
Pyroclastic flows and lava flows at Etna volcano

Mafic types of lava

Mafic describes magma or igneous rock that is rich in magnesium and iron and that is generally dark in color. Mafic magma has a low viscosity and it has less trapped gases which means that when the volcano erupts it makes a quiet eruption.

Lava Flows

Volcano Eruption Mount St. Helens May 18, 1980 USGS

Describe the three different types of volcanos