1. A rock formed from the consolidation of volcanic ash, pumice, and rock fragments ejected from a volcano during a pyroclastic flow.
Usage: geology; technical term

Examples

• The ignimbrite deposits in the valley were evidence of a massive volcanic eruption thousands of years ago.
• Geologists studied the ignimbrite layers to understand the history of volcanic activity in the region.
• The ignimbrite formation was so dense that it had welded together under its own weight.
• Ignimbrite is commonly found in areas with a history of explosive volcanic eruptions.
• The pink ignimbrite cliffs were a striking geological feature of the landscape.