Volcanic Eruptions

Describe pyroclastic material and lava

Pyroclastic Material

Pyroclastic material form during an eruption because of the rapidly expanding gases in the magma. Pyroclastic material ls also form when lava cools and solidify as they fly through the air.

Types of Pyroclastic Material

Pyroclastic particles that are less than 2mm are called volcanic ash. Volcanic ash that is less than 0.25mm is called volcanic dust. Large pyroclastic particles that are less than 64mm are called lapilli. Volcanic bombs spin through the air, they cool and develop a round or spindle shape. The large pyroclastic materials, are also known as volcanic blocks.

Different Types Of Pyroclastic Material