Item talk:Q41884
From geokb
Mindat Description
Rocks composed of volcanic fragments derived from explosive volcanic activity
Geoscience Ontology Description
Fragmental igneous rock that consists of greater than 75 percent fragments produced as a direct result of eruption or extrusion of magma from within the earth onto its surface. Includes autobreccia associated with lava flows and excludes deposits reworked by epiclastic processes.
