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,
The Quill (volcano) The Quill (volcano) The Quill is a stratovolcano located on the island of Sint Eustatius in the Caribbean Netherlands. The summit elevation is above sea level. It is also the second highest mountain in the Netherlands. The name 'Quill' originates from the Dutch term "kuil" (), meaning 'pit' or 'hole', which was used originally with reference to the volcanic crater. The Quill was designated as a national park by the government of the Netherlands Antilles in 1998. It is administered by the Sint Eustatius National Parks Foundation, STENAPA, which maintains a number of trails for hikers. The Quill formed between