Related by context. Frequent words. (Click for all words.) 68 magmas 64 lavas 63 basaltic 62 lithosphere 61 magmatic 59 carbonaceous 59 clasts 59 volcanic 59 igneous rocks 59 tuffs 58 peridotite 58 basalts 57 andesite 57 felsic 57 dacite 57 crustal 56 mafic 56 schists 56 olivine 56 igneous 56 gabbro 56 volcanic vents 56 continental crust 55 hydrothermal activity 55 volcanic rocks 55 sedimentary 55 biotite 55 sedimentary rock 55 iron oxides 54 pyroxenite 54 carbonate rocks 54 siliceous 54 basalt 54 silicates 54 igneous rock 54 mafic volcanics 54 granitic 54 subduction 54 ultramafic 54 oceanic crust 54 marine sediments 53 hydrothermal 53 Valles Marineris 53 sulphates 53 ultramafic rocks 53 monzonite 53 mafic volcanic rocks 53 calcite 53 biogeochemical 53 volcanic rock 53 banded iron 53 weakly mineralized 52 lava tubes 52 Precambrian 52 gneiss 52 mudstone 52 volcanics 52 sedimentary rocks 52 hydrothermal breccia 52 ocean ridges 52 earth crust 52 regolith 52 sulphide minerals 52 pyroclastic flow 52 carbonate replacement 52 breccia 52 graphitic 52 volcanism 52 magma 51 ejecta 51 metamorphic 51 silicate 51 outer crust 51 limestones 51 GPa 51 Earth crust 51 argillite 51 Tibetan Plateau 51 lava flows 51 carbonate 51 volcanic gases 51 siltstones 51 meteoroids 51 alkali 51 molten rock 51 quartz veinlets 51 feldspar 51 haematite 51 intrusives 51 jasperoid 51 calcareous 50 surficial 50 silica 50 spherules 50 potassic alteration 50 stratabound 50 overlie 50 bornite 50 radioactive decay 50 extensional 50 tectonic