Related by context. Frequent words. (Click for all words.) 70 magmatic 69 basalts 66 volcanism 65 hydrothermal 65 magma 64 crustal 64 olivine 63 silicates 62 sedimentary rocks 61 peridotite 61 subduction 60 intrusive rocks 60 carbonate 60 volcanic gases 60 sediments 60 volcanic 60 iron oxides 60 ejecta 59 lava flows 59 carbonaceous 59 subduction zones 58 plate tectonics 58 sedimentary rock 58 volcanic rocks 58 mineralizing 58 intrusives 58 silicate 58 volcanics 58 sedimentary 57 felsic 57 ultramafic rocks 57 lithology 57 lithologies 57 glaciation 57 tectonics 56 earth crust 56 basalt 56 andesite 56 carbonates 56 regolith 56 sulfides 56 methane hydrates 56 hydrothermal vents 56 sulphides 56 calcite 56 X ray emission 56 volcanoes 56 geologic 55 molten rock 55 Precambrian 55 sulphates 55 gabbro 55 granitic 55 isotopic 55 bornite 55 hydrothermal alteration 55 abundances 55 stratigraphy 55 landforms 55 Ordovician 55 apatite 54 brecciation 54 mafic 54 Earth crust 54 hematite 54 Paleozoic 54 mineralogy 54 metamorphic 54 caldera 54 breccias 54 Proterozoic 54 water vapor 54 diatoms 54 silica 53 sulfide mineralization 53 feldspar 53 potassic alteration 53 limestones 53 clay alteration 53 volcanic activity 53 subsurface 53 tectonic 53 geochemical 53 radioactive decay 53 metasediments 53 temperature gradient 53 convective 53 organic molecules 53 subduction zone 52 facies 52 meteoroids 52 mudstone 52 lava 52 Carboniferous 52 geochemistry 52 sulfide 52 granites 52 Eocene 52 terrestrial planets 52 alteration zones 52 interstellar medium