Related by context. Frequent words. (Click for all words.) 55 glaciation 52 volcanism 51 Late Cretaceous 49 Ordovician 48 glacial 48 crustal 48 Pleistocene 48 marine sediments 48 interglacial 47 Quaternary 47 oxygen isotopes 46 Mesozoic 46 Eocene 46 Cretaceous Period 46 Precambrian 46 Pliocene 46 plate tectonics 45 subduction 45 Holocene 45 igneous 44 Tibetan Plateau 44 isotopic 44 glacial melt 44 metamorphic 44 lithosphere 43 diatoms 43 Cretaceous 43 radiocarbon 43 Proterozoic 43 apatite 43 tectonic 42 retreating glaciers 42 nucleation 42 lake sediments 42 abundances 42 sulphate 42 Little Ice Age 42 methane hydrate 42 hydrological cycle 42 stalagmite 42 magmatic 42 silicates 41 sediments 41 Medieval Warm Period 41 glacial ice 41 sedimentary 41 eruptions 41 diatom 41 terrestrial ecosystems 41 atmospheric circulation 41 landmasses 41 geologically 41 eruptive 41 paleo 41 landforms 41 Oetzi 41 mammoths 41 Paleozoic 40 epochs 40 glaciers 40 calcite 40 acidified 40 mass extinctions 40 abiotic 40 Han Dynasty 40 volcanoes 40 lava flows 40 basalts 40 NSIDC 40 Paleolithic 40 glaciologists 39 sedimentary rocks 39 speciation 39 glacier melt 39 Volcanic eruptions 39 silicate 39 volcanic rocks 39 mid latitudes 39 anomalously 39 shrinking glaciers 39 oceanic crust 39 subduction zones 39 meltwater 39 continental drift 39 upwelling 39 meteoroid 38 Tambora 38 Tiktaalik 38 volcanic gases 38 megafauna 38 glaciated 38 Neandertal 38 biogenic 38 supernova explosions 38 mineralizing 38 sedimentary rock 38 glaciers melt 38 glacier 38 moraines 38 lunar poles 38 volcanic