Related by context. Frequent words. (Click for all words.) 55 stromatolites 53 fossils 53 microfossils 52 red ocher 51 zircons 50 flint tools 50 trilobites 50 marine invertebrates 50 Radiocarbon dating 50 coprolites 49 salt crystals 49 sedimentary rock 49 middens 49 chert 49 skull fragments 49 flints 48 foraminifera 48 fossilized 48 fragments 48 amphorae 48 fossil 48 dinosaur footprints 48 specimens 47 agates 47 diatom 47 excavated 47 fossilized bones 47 lake sediments 47 feathered dinosaurs 46 petrified wood 46 dinosaur fossils 46 morphologically 46 lava tubes 46 Ardipithecus 46 Otzi 46 hydrothermal vent 46 hominins 46 palaeontologists 45 calcareous 45 volcanic rock 45 fossilized remains 45 oxygen isotopes 45 Neandertals 45 marine sediments 45 H. erectus 45 dinosaur skeletons 45 hominin 45 coelacanth 45 plesiosaur 45 theropod 45 skull fragment 44 Neandertal 44 tetrapod 44 lunar soil 44 Longrich 44 sediment cores 44 striations 44 archaea 44 engravings 44 melanosomes 43 trackway 43 olivine 43 amphora 43 paleontological 43 tetrapods 43 sea anemones 43 bones 43 Australopithecus 43 lavas 43 radiocarbon dating 43 dinosaur bones 43 Burgess Shale 43 stalagmites 43 limestone cave 43 spherules 43 tusk 43 whalebone 43 Australopithecus afarensis 43 continental crust 42 whale skeleton 42 theropods 42 cycad 42 hieroglyphs 42 Mesolithic 42 stone carvings 42 pottery shards 42 baleen whales 42 radiocarbon 42 hadrosaur 42 tyrannosaurs 42 dinosaur fossil 42 skeletons 42 morphologies 42 parchments 42 supercontinent 42 Mapungubwe 42 palaeontologist 42 Ancient Egyptians 42 marl 42 Egyptian pyramids 42 carbonized