Related by context. Frequent words. (Click for all words.) 54 retreating glaciers 50 glaciers 48 icecap 48 glacier 47 permafrost 47 glacial 47 peat bog 47 buttes 47 lake sediments 46 moraines 46 marine sediments 46 Melting ice 45 Antarctic ice 45 glacial lakes 45 granite boulders 45 lakebed 45 icecaps 45 sedimentary rock 45 geological formations 45 glaciation 44 glacial ice 44 gullies 44 glacial melt 44 tundra 44 peat bogs 44 continental drift 44 meltwater 44 melting permafrost 44 mud flats 44 glacier melt 44 thawing permafrost 43 Greenland glaciers 43 stalagmite 43 geologic 43 streambeds 43 dinosaur footprints 43 mountain glaciers 43 glaciers melt 43 earth crust 43 massif 42 middens 42 rock formations 42 mountain ranges 42 crevasses 42 Permafrost 42 volcanic rock 42 Melting snow 42 landforms 42 shrinking glaciers 42 melting ice 42 glacially 42 rock outcrops 42 sandstone cliffs 42 wilderness 42 Martian landscape 41 towering peaks 41 Earth crust 41 jagged peaks 41 Weddell Sea 41 paleontological 41 volcanic crater 41 arctic 41 snowfield 41 salt flats 41 oceanic crust 41 stalagmites 41 magma chamber 41 hydrological cycle 40 continental crust 40 desolate landscape 40 musk oxen 40 vast expanses 40 underground cavern 40 geologic formations 40 glaciated 40 Ross Ice Shelf 40 Late Cretaceous 40 melting glaciers 40 Arctic tundra 40 petroglyph 40 fissures 39 crags 39 barren wasteland 39 snowy peaks 39 aridity 39 sediments 39 Sediments 39 talus 39 polar ice 39 sand dunes 39 depths 39 dinosaur fossils 39 moraine 39 Sinkholes 39 rocky coastline 39 Tibetan Plateau 39 Arctic Circle 39 fossils 39 boulder strewn 39 underground caverns 39 rugged wilderness