Related by context. Frequent words. (Click for all words.) 60 oceanic crust 60 subduction zones 59 ocean ridges 59 lithosphere 57 earth crust 57 crustal 56 continental crust 55 Earth crust 54 Anatolian fault 53 landmasses 53 megathrust 53 subduction zone 52 tectonics 52 Cascadia subduction zone 52 tectonic plate 51 subduction 51 igneous rocks 51 geologically 51 tectonic fault 51 calcareous 51 graben 51 Valles Marineris 51 geologically active 51 sedimentary basins 50 lavas 50 deltaic 50 outer crust 50 clasts 50 Cascadia Subduction Zone 50 volcanic vents 50 magma chamber 49 magmas 49 igneous 49 sedimentary rock 49 carbonate rocks 49 syncline 49 hydrothermal activity 49 mud volcanoes 49 lava tubes 49 peridotite 49 depositional 49 volcanoes 49 volcanically active 49 Olympus Mons 49 hydrothermally altered 49 landforms 48 plate tectonics 48 mantos 48 basaltic 48 sulphide minerals 48 NE trending 48 aragonite 48 Tibetan Plateau 48 basalts 48 pyroclastic 48 discontinuous 48 glaciated 48 laterally 47 ductile 47 hydrothermal breccia 47 terrestrial ecosystems 47 breccia zones 47 temperature gradient 47 Mineralization occurs 47 volcanic 47 intrusives 47 temperate forests 47 igneous rock 47 weakly mineralized 47 greenstone belts 47 Geologically 47 ultramafic rocks 47 plutons 47 torus 47 iron oxides 47 breccia pipes 47 deformation 47 polar vortex 47 moonlets 46 San Andreas Fault 46 basalt 46 cryosphere 46 porphyries 46 latitudinal 46 tectonic plates 46 mafic volcanic rocks 46 crystal lattice 46 tectonic 46 river deltas 46 marine sediments 46 collagen fibers 46 copper oxides 46 hydrothermal 46 mafic volcanics 46 cusps 46 magmatic 46 Cosmic rays 46 volcanism 46 sandstone formations 46 Kuiper belt 46 Kuiper Belt objects