adjective
- relating to or denoting rock fragments and ash ejected violently from a volcano during an eruption
Usage: geology; technical
Examples
- The pyroclastic flow from the volcano moved at speeds exceeding 100 miles per hour.
- Geologists studied the pyroclastic deposits left behind after the eruption.
- Pyroclastic materials include pumice, ash, and volcanic bombs.
- The pyroclastic cloud rose thousands of feet into the atmosphere.
- Ancient pyroclastic layers help scientists date volcanic events.