Common Igneous Rocks (Part 7)
Tuff
Tuff is an igneous rock with pyroclastic texture. Tuffs consist of fine-grained fragments created during volcanic eruptions. Some larger fragments are visible in this specimen.
Tuff (Photograph by Parvinder Sethi)
Volcanic Breccia
Volcanic breccia is an igneous rock with large, angular fragments of volcanic material. This breccia probably formed during a violent volcanic eruption.
Volcanic breccia (Photograph by Parvinder Sethi)