new mud volcano 

couple of quotes from this article  below

The presence of a large high-pressure underground natural gas reserves is a prerequisite for the mud eruption. Almost half of all mud volcanoes in the world are located in the area of the South Caspian Basin and about thirty of them - in western Turkmenistan

The Cheleken Alakel is the largest volcano in western Turkmenistan

both probably worthy of inclusion in the article or starting a stub