Related by context. Frequent words. (Click for all words.) 59 undersea volcanoes 59 extinct volcanoes 57 volcanic islands 57 Valles Marineris 57 lava tubes 56 Kilauea Volcano 56 volcanic peaks 55 volcanoes 54 Olympus Mons 54 volcanically active 54 Tharsis 54 hardened lava 53 landmasses 53 Anatolian fault 53 Volcano erupts 53 lava flows 53 Mount Asama 52 fumaroles 52 Russia Kamchatka Peninsula 52 pyroclastic 52 underwater volcanoes 52 volcanic crater 51 Strong quake jolts 51 mud volcanoes 51 tectonic fault 51 Chaiten volcano 51 lahars 51 Gondwanaland 51 equatorial Pacific Ocean 51 graben 51 Etorofu 50 Eruptions 50 ancient kingdoms 50 Augustine Volcano 50 Mount Spurr 50 active volcanoes 50 basaltic 50 Volcanic eruptions 50 Mentawai chain 50 supercontinent 50 lava flowing 49 caldera 49 volcano Mount Merapi 49 tropopause 49 steam vents 49 limestone cave 49 lava tube 49 magma chamber 49 Anatahan 49 plutons 49 tectonic plates collide 49 undersea volcano 49 Quake jolts 49 Qinghai Tibet Plateau 48 sandstone formations 48 supervolcano 48 Svalbard archipelago 48 coral atolls 48 clathrates 48 erosional 48 volcanic 48 temperate rainforest 48 active volcanos 48 glacial lakes 48 hydrothermally altered 48 dormant volcano 48 Mount Ruapehu 48 pyroclastic flow 48 hydrothermal breccia 48 andesitic 48 lithosphere 48 subduction zones 48 Pamir Mountains 48 volcanic vents 48 granitic rocks 48 ocean ridges 48 breccia pipes 48 deep gorges 48 metamorphic rocks 48 biosphere reserves 47 volcanic gases 47 evergreen forests 47 biodiversity hotspot 47 Kilauea volcano 47 lava 47 limestone caves 47 Omo River 47 quartz monzonite 47 Indonesian archipelago 47 volcanic plume 47 seamount 47 Kuiper belt 47 volcanic eruptions 47 Great Rift Valley 47 equatorial waters 47 Vulcanologists 47 clasts 47 Bohai Sea 47 hydrothermal fluids 47 Tibetan Plateau 47 oceanic crust