Of or pertaining to a volcano or volcanoes; as, volcanic heat.
Produced by a volcano, or, more generally, by igneous agencies; as, volcanic tufa.
Of, pertaining to, like, or characteristic of a volcano; characterized by or composed of volcanoes; produced, influenced, or changed by a volcano or by volcanic agencies; made of materials derived from volcanoes.
A variety of igneous rock which is fine grained or glassy due to rapid cooling upon or near the surface of the earth.
rock from molten lava.
Structures, activities and rock types associated with volcanic eruptions.
relating to or produced by or consisting of volcanoes; "volcanic steam"; "volcanic islands such as Iceland"; "a volcanic cone is a conical mountain or hill built up of material from volcanic eruptions"
igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt; "volcanic rock includes the volcanic glass obsidian"
Related to, or formed by, the eruption or extrusion of molten materials onto the surface of the earth (on land or under water). Volcanic, or extrusive, rocks are one type of igneous rock.
Igneous rocks that have reached or nearly reached the earth's surface before solidifying, for example lavas.
adj. Describes the action or process of magma and gases rising to the crust and being extruded onto the surface and into the atmosphere; also applies to the resulting igneous rocks that cool on the surface of the Earth, including beneath water, which typically have small crystals due to the rapidity of cooling. volcanically - adv. extrusive - syn. plutonic - ant.
Pertaining to igneous rocks which have been erupted from volcanoes;