Related by context. Frequent words. (Click for all words.) 70 supercontinent 59 stromatolites 59 continental crust 58 landmasses 55 lithosphere 55 volcanic islands 54 continental drift 54 Gondwana 54 graben 54 palaeontologists 54 Late Cretaceous 54 Paleocene 54 sedimentary basins 54 sedimentary rock 54 lavas 54 Carboniferous 53 Kuiper belt 53 lava tubes 53 Cretaceous Period 53 sedimentary basin 52 Burgess Shale 52 fossils 52 glaciation 52 Beringia 52 basaltic 52 basalts 52 Weddell Sea 52 oceanic crust 52 zircons 52 paleoclimate 51 marine sediments 51 Chicxulub 51 H. erectus 51 solar nebula 51 Earth crust 51 microfossils 51 ocean ridges 51 Lower Cretaceous 51 megafauna 51 Geologically 51 magma chamber 51 lake sediments 51 hydrothermal vent 51 Ross Ice Shelf 51 trilobites 51 igneous rock 51 Meridiani 51 middens 50 Neandertals 50 marine reptiles 50 terrestrial ecosystems 50 seabeds 50 megaliths 50 temperate forests 50 landmass 50 Columbian mammoth 50 earth crust 50 interglacial period 50 feathered dinosaurs 49 geologic 49 plate tectonics 49 evergreen forests 49 carnivorous dinosaurs 49 genus Homo 49 foraminifera 49 Quaternary 49 olivine 49 Mesozoic 49 archaea 49 Younger Dryas 49 dinosaur footprints 49 depositional 49 Paleozoic 49 limestone cave 49 crustal 49 Ellesmere Island 49 Paleontologists 49 Archaea 49 icecaps 49 Precambrian 49 alluvial deposits 49 interglacial 49 polar caps 49 Pleistocene 49 Pleistocene era 49 calcareous 49 landforms 49 limestone caves 48 terrestrial planets 48 glacial ice 48 termite mounds 48 cryosphere 48 oxygen isotopes 48 biodiversity hotspot 48 volcanic crater 48 tetrapods 48 theropod 48 Anthropocene 48 palaeontology 48 geologists 48 volcanically active