Related by context. Frequent words. (Click for all words.) 72 lithosphere 68 crustal 64 subduction 64 subduction zones 63 earth crust 63 Earth crust 62 subduction zone 61 basalts 61 plate tectonics 61 sedimentary rock 60 volcanism 58 magmatic 58 sedimentary 58 sediments 57 tectonics 57 olivine 57 basalt 57 peridotite 57 caldera 57 lava flows 57 magma 57 landmasses 57 landforms 57 igneous 56 ejecta 56 hydrothermal 55 sedimentary rocks 55 volcanic rock 55 geologically 55 tectonic plate 55 stratigraphy 55 regolith 55 glacial ice 55 Precambrian 55 sedimentary basins 54 volcanics 54 carbonate 54 sedimentary basin 54 seafloor 54 andesite 54 tectonic 54 granitic 53 limestones 53 crust 53 Weddell Sea 53 calcite 53 lake sediments 53 seamounts 53 mudstone 53 glaciation 53 Tibetan Plateau 53 carbonaceous 53 hydrothermal vents 52 temperature gradient 52 gneiss 52 continental drift 52 seamount 52 intrusive rocks 52 volcanic 52 volcanic rocks 52 Carboniferous 52 silicates 52 molten rock 52 Ordovician 52 carbonates 52 Antarctic Peninsula 51 icecap 51 permafrost 51 glacier 51 Antarctic Ice 51 talus 51 upwelling 51 tectonic plates collide 51 Paleozoic 51 mineralizing 51 Geologically 51 meltwater 51 volcanic islands 51 geologic 51 gas hydrates 51 geologically active 50 sediment cores 50 ultramafic rocks 50 chalcocite 50 granites 50 Quaternary 50 lava 50 Mesozoic 50 tuffs 50 troposphere 50 glaciers 50 Antarctic ice 50 alluvium 50 facies 50 Proterozoic 50 Eocene 50 radioactive decay 50 subsurface 50 seabed 50 deformation 50 volcanic crater