the 1980 eruption of Mount St. Helens, the large eruptions from the Yellowstone Caldera, and the 1991 eruption of Mount Pinatubo. The word pyroclastic comes from the Ancient Greek words pyr, meaning "fire", and klastos, meaning "broken in pieces".

Description

Unconsolidated accumulations of pyroclasts are described as tephra. Tephra may become lithified to a pyroclastic rock by cementation

1.Previous
3.Next