  a mudpot â or mud pool â is a sort of acidic hot spring, or fumarole, with limited water. it usually takes the form of a pool of bubbling mud. the acid and microorganisms decompose surrounding rock into clay and mud. ==description== the mud of a mudpot takes the form of a viscous, often bubbling, slurry. as the boiling mud is often squirted over the brims of the mudpot, a sort of mini-volcano of mud starts to build up, sometimes reaching heights of 3â5 feet. although mudpots are often called "mud volcanoes", true mud volcanoes are very different in nature. the mud of a mudpot is generally of white to greyish color, but is sometimes stained with reddish or pink spots from iron compounds. when the slurry is particularly colorful, the feature may be referred to as a paint pot. ==geology== mudpots form in high-temperature geothermal areas where water is in short supply. the little water that is available rises to the surface at a spot where the soil is rich in volcanic ash, clay and other fine particulates. the thickness of the mud usually changes along with seasonal changes in the water table. ==notable sites== the geothermal areas of yellowstone national park contain several notable examples of both mudpots and paint pots, as do some areas of iceland and new zealand. ==photo gallery== image:fountain paint pots in yellowstone-750px.jpg|fountain paint pots, yellowstone national park image:mudpot_8334.jpg|mudpot in lassen volcanic national park image:yellowstone mud pot p1090998.jpg|mudpot in yellowstone national park image:rincÃ³nmudpot apr2003.jpg|mudpot at rincÃ³n de la vieja volcano national park, costa rica image:mud pool near waiotapu.ogg|short video of mud pool activity near waiotapu, new zealand file:mud pool at orakei korako.ogg|video of mud pool at orakei korako, new zealand image:hverir mudpool 2012-06-05.jpg|erupting mudpot at hverir, iceland image:yellowstonemudpit.jpg|a mud pot in yellowstone national park, wyoming 
Hydrothermal_vents Springs_(hydrology)