Volcano were proposed for volcano behavior before the modern understanding of the Earth's mantle structure as a semisolid material was developed. For decades after awareness that compression and radioactive materials may be heat sources, their contributions were specifically discounted. Volcanic action was often attributed to chemical reactions and a thin layer of molten rock near the surface. Volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Earth's volcanoes occur because its crust is broken into 17 major,
Under the Volcano Festival Under the Volcano Festival Under The Volcano Festival Of Art & Social Change was an activist, grassroots gathering held at Whey-Ah-Wichen Cates Park on the traditional territory of the Tsleil-Waututh Nation in North Vancouver, BC in August. "Under the Volcano" was Canada's largest political arts festival and was 100% volunteer produced. The festival took its name from the well-known book of the same name by Malcolm Lowry, who squatted in Cates Park in the 1940s. The festival was started in 1990 by Vancouver social activist and artist Irwin Oostindie, and was produced by a dedicated group of volunteers until its