Rock composed of irregular or clastic fragments (generally lava), encapsulated by a fine-grained matrix. These are produced during eruptions and deposited close to the volcano.
Incandescent particles that are erupted violently from the crater of the volcano, as opposed to lava which travels along the surface. The primary product is volcanic ash which is composed of fragments of crystal and glass
A phenomenon in which magma ascends through the earth’s crust and cools deep underground to form intrusive rocks; also refers to the volcanic or effusive rocks that are formed when magma reaches the surface to form a volcano.