Related by context. Frequent words. (Click for all words.) 61 volcanism 58 ejecta 58 glaciation 57 mass extinction 55 geologic 55 greenhouse warming 53 supernova explosion 53 plate tectonics 52 journal Geology 52 isotopic 51 mass extinctions 51 olivine 51 University Lamont Doherty 51 Tunguska 51 Ordovician 50 crustal 50 tectonics 50 geologically active 50 Nature Geoscience 49 sediments 49 NSIDC 49 Eocene 49 cometary 48 supernova explosions 48 geological 48 magmatic 48 subduction zones 48 geophysicists 48 subduction 48 volcanic eruptions 48 glacial melt 48 GRBs 48 seismicity 48 mineralizing 47 sedimentary rock 47 hydrothermal 47 radiocarbon 47 meteorite 47 sediment cores 47 paleontological 47 atmospheric circulation 47 asteroid 47 tectonic 47 lava flows 47 gravitational lensing 47 cosmic ray 47 Precambrian 47 computer simulations 46 megafauna 46 silicates 46 atmospheric carbon dioxide 46 radiocarbon dating 46 calcite 46 dynamical 46 meteorites 46 fossils 46 lake sediments 46 Geologic 46 Little Ice Age 46 Greenland ice 46 mid latitudes 46 basalt 46 Pliocene 46 meteor 45 polar caps 45 geologists 45 radioactive decay 45 Pleistocene 45 sedimentary rocks 45 upwelling 45 volcanic eruption 45 landmasses 45 El Ninos 45 astrophysical 45 landforms 45 anthropogenic 45 Earth Observatory 45 atmospheric chemistry 45 Iapetus 45 astronomers 45 permafrost 45 anthropogenic climate 44 Theorists 44 Eta Carinae 44 globular clusters 44 dwarf galaxy 44 paleo 44 comet 44 ENSO 44 abundances 44 melting permafrost 44 volcanic 44 Geophysical Research 44 comets 44 glaciers 44 regolith 44 Earth crust 44 Holocene 44 cosmic rays 44 elliptical galaxies 44 Einstein theory