Related by context. Frequent words. (Click for all words.) 62 methane hydrate 59 volcanism 59 volcanoes 59 sedimentary basins 59 hydrothermal vents 58 methane hydrates 57 marine sediments 57 lavas 57 lava flows 56 oceanic crust 56 volcanic crater 56 geologically active 55 basalt 55 Geochemistry 55 volcanic 55 volcanically active 55 sediment cores 55 magmatic 55 lava tube 55 landforms 54 geological formations 54 magma chamber 54 subduction zones 54 lava 53 geomorphology 53 active volcanoes 53 hydrothermal 53 molten rock 53 tectonics 53 volcanic gases 53 continental crust 53 geological 52 Geologically 52 volcanic activity 52 magma 52 seamount 52 glacial lakes 52 basalts 52 gas hydrates 52 Meridiani 51 peridotite 51 Tambora 51 Geologists 51 hydrocarbons 51 seismicity 51 sediments 51 geologically 51 sedimentary rock 51 geologic 51 lake sediments 51 Saturn moon Enceladus 51 seafloor 51 intertidal 51 crustal 51 geologists 51 geologic formations 50 karst 50 lithosphere 50 caldera 50 landmasses 50 lunar poles 50 dormant volcano 50 outcroppings 50 Kuiper belt 50 trilobites 50 abiotic 50 seismic activity 50 subduction zone 50 fossils 50 glaciers 50 subsurface 50 Ordovician 50 mudstone 50 Volcanic eruptions 49 dinosaur footprints 49 volcanic islands 49 hot springs 49 volcanic rock 49 olivine 49 seamounts 49 seabed 49 limestones 49 relatively unexplored 49 biogenic 49 lava flow 49 geology 49 earth crust 49 tectonic 49 sedimentary rocks 49 geologic formation 49 outcrops 49 Tibetan Plateau 49 fluvial 49 methane 48 active volcanos 48 sedimentary 48 Lower Cretaceous 48 permafrost 48 rock formations 48 volcano 48 Kilauea Volcano