What is Mud volcano?
[[File:Gobustan State Reserve 04.png|thumb|Lots of mud volcanoes in [[Gobustan Rock Art Cultural Landscape|Gobustan]], [[Azerbaijan]].]] A '''mud volcano''' or '''mud dome''' is a kind of [[volcano]] that is made by liquids and gases from the earth. There are many different ways that mud volcanoes can be made. [[Temperature]]s in a mud volcano are much cooler than that of a regular volcano. The biggest mud volcanoes are 10&nbsp;kilometers in [[diameter]] and can be as tall as 700&nbsp;meters.{{fact|date=April 2009}} Most of the gases given off by mud volcanoes are [[methane]]. Other gases given off include [[carbon dioxide]] and [[methane]]. They usually spit out liquids with solids in the liquids. An example of this would be water with salt or [[acid]]s in the water. == Details == A mud volcano is usually made by [[mud]] [[diapir]] that breaks out of the surface of the Earth or on the ocean bottom. Temperatures in mud volcanoes can be as low as the freezing point. Mud volcanoes are often linked with places where [[petroleum]] gathers and around areas of [[tectonic subduction]]. They can also be linked with [[orogeny|orogenic belts]] where [[hydrocarbon]] gases usually [[wikt:erupt|erupt]]. They are also often linked with [[volcano|lava volcanoes]] as well. However, instead of spitting out magma, mud volcanoes spit out gases like methane and carbon dioxide. Around 1,100 mud volcanoes have been found on land and in shallow water. People think that more than 10,000 mud volcanoes may [[wikt:exist|exist]] on [[continental shelf|continental slopes]] and [[abyssal plain]]s. === Features and what they give off === There are many [[wikt:features|features]] of mud volcanoes. One of these features is the gryphon, which is a [[wikt:steep|steep]], short cone that gives off mud. Another feature is the mud [[volcanic cone|cone]], which is a tall cone that makes mud and small pieces of rock. The [[scoria]] cone is a cone that is made when [[wikt:deposits|deposits]] of mud are heated up and the [[salse]], which are pools of