Pyroclastic flow
Appearance

A pyroclastic flow (also known as a pyroclastic density current)is a common result of volcanic eruptions. The flows are currents of hot gas, or tephra, during an eruption that sometimes causes rock falls.
A pyroclastic flow (also known as a pyroclastic density current)is a common result of volcanic eruptions. The flows are currents of hot gas, or tephra, during an eruption that sometimes causes rock falls.