Volcanoe Erruption

Describe pyroclastic material ad lava flows

Quiet Eruptions

Oceanic volcanoes commonly form form mafic magma. Mafic magma has a really low viscosity which causes some gases to escape easily from the mafic magma. The mafic magma is made of magnesium and iron, and it is also dark colored.

Violent Eruptions

On the other hand, the felsic magma is more powerful because it has more gases trapped inside such as carbon dioxide and water vapor. Felsic magma tends to explode and throw pyroclastic material into the air. This magma has a high viscosity, it's light covered, and it's made of silica ad feldspar.

Types of Lava

Pyroclastic Material

The Five Types

Cinder cones are volcanoes that always have a violent eruption and are made of pyroclastic material. Composite volcanoes have layers of hardened lava flows and pyroclastic material. During a quiet eruption the lava flows on the sides of the cone,but if it's an explosive eruption large amounts of pyroclastic material are deposited around the vent. They are aso known as stratovolcanoes. Some pyroclastic materials form when the magma breaks into fragments during a volcanic eruption. Other pyroclastic materials form when the fragments of erupting lava cools and solidifies as they fly through the air.if pyroclastic particles are smaller than 2mm in diameter scientist call it volcanic ash. Volcanic ash that is LESS than 0.25 mm in diameter is called volcanic dust. Large pyroclastic particles that are less than 64 mm in diameter are called lapilli. Lapilli generally fall near the vent. Large clots of lava may be thrown out of an erupting volcano while they are red-hot. When they're are spinning in the air, they cool and develop a round or spindle shape these are called volcanic bombs. The largest pyroclastic particles are the volcanic blocks. Volcanic blocks form from solid rocks that are blasted from the vent.