Mudpot

A mudpot — or mud pool — 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. 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 ...
Found on http://en.wikipedia.org/wiki/Mudpot

mudpot

an acidic hot spring with limited water supply
Found on http://www.windowsintowonderland.org/eobe/glossary.shtml
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