Related by context. Frequent words. (Click for all words.) 66 lithosphere 63 biogeochemical 62 cryosphere 61 volcanism 61 crustal 61 hydrological cycle 60 tectonics 59 continental crust 58 biogeochemistry 58 plate tectonics 58 atmospheric circulation 58 Tibetan Plateau 58 geomorphology 58 isotopic composition 57 poleward 57 anisotropy 57 depositional 56 marine sediments 56 hydrothermal activity 56 landforms 56 radiative 55 lavas 55 Valles Marineris 55 glacial melting 55 ejecta 55 atmospheric methane 55 mid latitudes 55 temperature gradient 55 greenhouse warming 55 magnetic reconnection 55 earth crust 55 permafrost 54 magmatic 54 polar caps 54 convective 54 volcanic gases 54 Earth magnetosphere 54 bathymetry 54 oceanic crust 54 water vapor 54 landform 54 tectonic 54 Earth crust 54 terrestrial ecosystems 54 latitudinal 54 geologic 53 electron density 53 regolith 53 aerosol particles 53 deformation 53 anisotropic 53 solar corona 53 basaltic 53 atmospheric CO 53 solar irradiance 53 glaciation 53 radioactive decay 53 albedo 53 morphologies 53 oxygen isotopes 53 subduction 52 igneous rock 52 galaxy formation 52 continental drift 52 microstructures 52 osmium 52 Polar Regions 52 ocean ridges 52 submicron 52 Pacific Decadal Oscillation 51 solar nebula 51 torus 51 atmospheric chemistry 51 sediments 51 astrophysical 51 atmospheric CO2 51 basalts 51 atmospheric 51 X ray emission 51 nitrogen fixation 51 glacial retreat 51 lake sediments 51 subsurface 51 auroral 51 topological 51 volcanically active 51 geologically active 51 paleoclimate 51 glacial melt 51 methane hydrate 51 thawing permafrost 51 Meridiani 51 volcanic 51 olivine 51 ribozyme 50 explosive eruptions 50 carbonaceous 50 interstellar medium 50 desorption 50 lava tubes 50 dynamical