Related by context. Frequent words. (Click for all words.) 66 stalagmites 56 basalt 54 stalactites 54 lake sediments 54 limestone 54 calcite 52 sandstone 52 sedimentary rock 52 landforms 50 volcanism 50 glaciers 49 olivine 49 volcanic rock 49 geologic 48 Tibetan Plateau 48 sediment cores 48 glacier 48 karst 48 lichens 48 crustal 47 rock formations 47 fossils 47 massif 47 caldera 47 icecap 47 Earth crust 46 stupa 46 sedimentary 46 cave 46 lichen 46 topography 46 glaciation 46 earth crust 45 sandstone cliffs 45 Wilkins Ice Shelf 45 caves 45 radiocarbon dating 45 glacial ice 45 diatom 45 sediments 45 silicate 45 tectonics 45 volcanic crater 45 Geologists 45 isotopic 45 lava flows 44 seismic activity 44 glacial melt 44 Medieval Warm Period 44 Late Cretaceous 44 glacial 44 calcium carbonate 44 radiocarbon 44 glacier melt 44 stone slabs 44 petrified wood 44 Greenland Ice 44 granite boulders 44 glacial lakes 44 geologically 44 volcanoes 44 glaciologists 44 fossilized bones 43 meltwater 43 geological 43 prehistoric 43 paleontological 43 sedimentary rocks 43 travertine 43 seismicity 43 mountain ranges 43 quartzite 43 paleo 43 nucleation 43 polar caps 43 permafrost 43 buttes 43 volcanic activity 43 Ordovician 43 iron oxides 43 volcanic eruptions 43 petroglyph 42 Greenland ice 42 geologically active 42 mountain glaciers 42 peridotite 42 fossilized remains 42 microstructures 42 magma 42 lava flow 42 volcanic 42 Antarctic ice 42 limestones 42 diatoms 42 fossilized 42 mineralogical 42 striations 42 sediment 42 lava 42 fossil 42 ice crystals