mud volcano
Earth burps sludge
A mud volcano is a geological formation where mud, water, and gases—usually methane—erupt from underground, building a cone-shaped mound.
Unlike true volcanoes, they're driven by pressurized fluids rather than magma, though some occur in volcanic regions.
They range from small bubbling pools to structures hundreds of meters tall: The Lusi mud volcano in Indonesia has been erupting continuously since 2006.
Impact or volcanic basin
- coneTapered solid, circular base
- ventOpening for airflow
- calderaCollapsed volcanic summit basin
- eruptionViolent sudden release
sediment · seepage · hydrocarbon · methane · breccia · fault · subsidence · liquefaction
Semi-solid waste material
- clayMoldable earth for ceramics
- oozeSeep gradually out
- mireBoggy, waterlogged terrain
- slurrySemifluid mixture of solids
sediment · silt · viscous · bubbling · thick · gray · wet · sticky
Heated groundwater emerging naturally
- fumarolesVolcanic gas vents
- steam ventsGeothermal gas outlets
- hydrothermalHot water underground
- thermal watersNaturally heated groundwater
sulfur · geysers · heat flow · boiling · thermophilic · magmatic · geothermal field · bubbling
Heaped earth formation
- poolCollective fund or basin
- flowUnbroken forward movement
- terrainLand's physical features
- barrenUnable to produce
lunar · otherworldly · formation · field · depression · flat · basin · surface
Hole-making by rotation
- surveyingMeasuring and charting terrain
- mappingDiagram of correspondences
- expeditionOrganized exploratory journey
- core samplesCylindrical sections extracted by boring
borehole · prospecting · geophysics · remote sensing · seismology · field study · sampling · monitoring
crater
Impact or volcanic basin
eruption · sediment · seepage · hydrocarbon · methane · breccia · fault · subsidence · liquefaction · tectonic
sludge
Semi-solid waste material
slurry · sediment · silt · viscous · bubbling · thick · gray · wet · sticky · gloopy
hot springs
Heated groundwater emerging naturally
- fumarolesVolcanic gas vents
- steam ventsGeothermal gas outlets
- hydrothermalHot water underground
thermal waters · sulfur · geysers · heat flow · boiling · thermophilic · magmatic · geothermal field · bubbling · mineral deposits
mound
Heaped earth formation
barren · lunar · otherworldly · formation · field · depression · flat · basin · surface · crust
drilling
Hole-making by rotation
- surveyingMeasuring and charting terrain
- mappingDiagram of correspondences
- expeditionOrganized exploratory journey
core samples · borehole · prospecting · geophysics · remote sensing · seismology · field study · sampling · monitoring · research
mud volcanostratovolcano
Layered cone-shaped volcanic mountain
shield volcano · cinder cone · lava dome · volcanic eruption · hot spring
mud volcanosinkhole
Underground collapse crater
crater lake · caldera · depression · canyon · cave
mud, volcano, muds, muddy, muddied, muddying, muddiness, volcanos, volcanoes