Related by context. Frequent words. (Click for all words.) 63 Burgess Shale 60 ichthyosaur 54 Joggins 54 Sable Island 53 Neoproterozoic 53 ammonites 53 Carboniferous 53 relict 52 basalt rock 52 sedimentary layers 52 temperate rainforest 52 Ediacaran 52 hydrothermal vent 51 plesiosaurs 51 concretions 51 Late Jurassic 51 mosasaurs 51 radiocarbon dated 51 Upper Jurassic 51 Moho 51 massive sulphide deposits 51 dinosaur footprints 51 Archaean 51 biodiversity hotspot 50 horned dinosaur 50 calcareous 50 mosasaur 50 trilobite 50 preserved fossils 50 misty mountains 50 Gigantoraptor 50 Ungava 50 fossil 50 marine sediments 50 hominid fossils 50 Albertosaurus 50 fossilized skull 50 Early Cretaceous 50 plesiosaur 49 peccary 49 Lower Cretaceous 49 sedimentary rock 49 Jurassic era 49 Point Pelee 49 lava tubes 49 volcanic cone 49 Namib Desert 49 mudstones 49 Baie Verte Peninsula 49 volcanogenic massive sulphide 49 Piedras Blancas 49 trilobites 49 Fossilized 49 baleen whale 49 Upper Cretaceous 49 Silurian 49 lavas 49 dinosaur species 49 Dry Valleys 49 oceanic crust 49 Arctic permafrost 48 KV# 48 middens 48 Lake Vostok 48 mammoth tusk 48 Skeleton Coast 48 Desolation Sound 48 cretaceous 48 Geochemistry 48 carnivorous dinosaur 48 Tiktaalik 48 Jurassic Period 48 Hydrothermal 48 Paleocene 48 giant tortoise 48 igneous rocks 48 rugged cliffs 48 dinoflagellate 48 Quaternary 48 dinosaur fossil 48 stromatolites 48 fossils 48 trackway 48 Chicxulub crater 48 trackways 48 skink 47 igneous 47 Gondwanaland 47 undersea volcanoes 47 intertidal 47 REE bearing 47 Altai Mountains 47 volcanic vents 47 beaked whale 47 gneisses 47 T.rex 47 Martian meteorites 47 Gusev crater 47 Fundy 47 Near Surface 47 igneous rock