Related by context. Frequent words. (Click for all words.) 62 glaciers 61 glacier 61 glacial ice 60 glaciation 57 permafrost 57 landmasses 57 icecap 56 polar caps 56 plate tectonics 56 meltwater 56 crustal 56 polar ice 56 landforms 56 Tibetan Plateau 55 Antarctic Peninsula 55 Antarctic Ice 55 Greenland ice 55 Greenland Ice 55 Antarctic ice 55 mountain glaciers 55 lake sediments 54 ejecta 54 sediments 54 sedimentary rock 54 melting permafrost 54 sedimentary rocks 54 Greenland glaciers 54 mid latitudes 54 Earth crust 54 glacial 52 Antarctica 52 lakebed 52 Quaternary 52 basalts 52 Arctic Ocean 52 boreal forests 52 glacial melt 52 volcanism 51 Wilkins Ice Shelf 51 oceans 51 sedimentary basin 51 polar 50 megafauna 50 sedimentary 50 Little Ice Age 50 landmass 50 subduction zones 50 continental drift 50 boreal forest 50 Arctic tundra 50 lava flows 50 atmospheric carbon dioxide 50 polar regions 49 peridotite 49 olivine 49 Antarctic peninsula 49 diatoms 49 earth crust 49 basalt 49 tundra 49 Medieval Warm Period 49 boreal 49 caldera 49 Ellesmere Island 49 NSIDC 49 sediment cores 49 atmospheric circulation 48 glaciologists 48 Late Cretaceous 48 magnetosphere 48 circumpolar 48 alluvium 48 biomes 48 sediment 48 mass extinctions 48 glacial lake 48 tectonics 48 volcanic rocks 48 geologic 48 calcite 47 latitudes 47 cosmic microwave background 47 mountain ranges 47 atmospheric CO2 47 volcanic eruptions 47 Greenland 47 supernova explosions 47 Glaciers 47 Iapetus 47 Pleistocene 47 glacier melt 47 Ordovician 46 Precambrian 46 albedo 46 comet nucleus 46 Martian surface 46 Permafrost 46 supernova explosion 46 lichens 46 sedimentary basins 46 Qinghai Tibet Plateau