Related by context. Frequent words. (Click for all words.) 49 superheated steam 48 temperature gradient 45 ionized gas 45 molten rock 44 magma chamber 44 seawater 44 methane hydrate 43 hot springs 43 lavas 42 volcanic 42 marine sediments 42 groundwater 42 glacial melt 41 hydrothermal 41 volcanic crater 41 water vapor 41 evaporation 41 sulfuric 41 evaporative 41 geo thermal 41 snow melt 41 geothermal 41 methane 41 Saturn moon Enceladus 41 magma 41 underground aquifer 40 aquifers 40 alpine lakes 40 seeps 40 lakebed 40 oceanic crust 40 degassing 40 meltwater 40 carbonic acid 40 silty 40 sediment 40 silicate 40 methane hydrates 40 vapor 39 glaciers melt 39 permafrost 39 conductivity 39 lava flows 39 ocean ridges 39 melts 39 Seawater 39 sediments 39 lithosphere 39 volcanic gases 39 spewed ash 39 molten salt 39 glacial melting 39 desalinated 39 cools 39 volcanism 38 sedimentation 38 evaporative cooling 38 geysers 38 liquefies 38 ultraviolet UV radiation 38 molten 38 basaltic 38 heat exchanger 38 liquid helium 38 hydrostatic pressure 38 aquifer 38 alluvial deposits 38 underground aquifers 38 icecap 38 Geodynamics 38 seepage 38 lava 38 Permafrost 38 aerosol particles 38 contaminating groundwater 38 glacier melt 38 adsorption 38 reservoir 38 magmatic 38 volcanoes 38 water 37 volcanic activity 37 volcanically active 37 desorption 37 arid regions 37 geyser 37 volcanic tremors 37 airstream 37 basalt 37 plate tectonics 37 entrained 37 molten lava 37 upwelling 37 equatorial Pacific Ocean 37 contaminate groundwater 37 melting 37 mud baths 37 geologically active 37 icecaps 37 radioactive decay 37 snowmelt