Concentric mud bubble

 

The formation of this mud pool feature starts with the rise of hydrothermal fluids, a mixture of superheated water and dissolved gases. As these fluids encounter clay-rich soils, they interact, resulting in the formation of a slurry. The circular morphology and concentric ring structure observed are indicative of a localised vent, where the pressurised hydrothermal fluids breach the surface. The viscosity and texture of the mud are influenced by rainfall as well as the rate of degassing.