Related by context. Frequent words. (Click for all words.) 63 Burgess Shale 61 Columbian mammoth 57 hadrosaur 57 paleontological 57 fossils 57 coprolites 57 microfossils 56 marine sediments 56 stromatolites 56 feathered dinosaurs 55 fossilized remains 55 fossilized bones 55 Paleocene 55 palaeontology 55 geologic 55 fossil 54 marine reptile 54 Late Cretaceous 54 hydrothermal vent 54 trackways 54 Lower Cretaceous 54 tyrannosaur 53 dinosaur fossil 53 Carboniferous 53 sauropod 53 depositional 53 dinosaur fossils 53 trilobites 53 magma chamber 53 radiometric anomaly 53 Ordovician 52 theropod 52 Radiocarbon dating 52 tyrannosaurus rex 52 Lake Vostok 52 dinosaur footprints 52 Jurassic Period 52 Palaeontology 52 Quaternary 52 igneous rock 52 Cretaceous Period 52 dinosaur bones 52 Diplodocus 52 Skarn 52 prehistoric 52 trackway 52 supercontinent 51 geologic formations 51 Heruga 51 whale skeleton 51 massive sulphide deposit 51 paleoclimate 51 hydrothermal activity 51 Chicxulub 51 faunal 51 Neandertal 51 Beringia 51 Cambrian explosion 51 geologic formation 51 magnetite mineralization 51 ammonites 51 marine reptiles 51 placental mammals 51 lake sediments 51 glaciation 51 continental crust 51 lava tubes 51 graben 51 massive sulphide deposits 51 zircons 50 Meteor Crater 50 palaeontologists 50 genomic sequence 50 plesiosaur 50 mineralizing system 50 Valles Marineris 50 stegosaurus 50 rock outcrops 50 wooly mammoth 50 palaeontologist 50 rock outcrop 50 stalactite 50 billed dinosaur 50 landform 50 paleontologists 50 pterosaur 50 geological 50 limestone caves 50 oceanic crust 50 breccia zone 49 fossilization 49 Rhyolite 49 igneous rocks 49 Ardipithecus 49 dinosaur skeleton 49 henge 49 Tyrannosaurus rex 49 carnivorous dinosaurs 49 basalt 49 supervolcano 49 dinosaur