Related by context. Frequent words. (Click for all words.) 60 microfossils 60 Cenozoic 59 stromatolites 59 Early Cretaceous 59 marine sediments 58 montane 58 radiocarbon dated 58 preserved fossils 57 intertidal 57 Late Cretaceous 57 placental mammals 57 embayment 57 fossil specimens 56 platypuses 56 relict 56 faunal 56 middens 56 Carboniferous 56 limestone caves 56 biogeochemical 55 landforms 55 fossils 55 baleen whale 55 geomorphology 55 trilobites 55 Jurassic Period 55 Archaean 55 systematics 55 foraminifera 54 taxa 54 Late Triassic 54 hydrothermal vent 54 arthropod 54 cycad 54 isotope ratios 54 lava tubes 54 limestone formations 54 diatom 54 dinosaur footprints 54 taxon 54 skink 54 mud volcanoes 53 Paleocene 53 Quaternary 53 ammonites 53 biodiversity hotspot 53 plesiosaurs 53 temperate forests 53 coniferous forests 53 Fossilized 53 species 53 monazite 53 damselfish 53 inter tidal 52 Geochemistry 52 zircons 52 Burgess Shale 52 sandstone formations 52 morphological 52 feathered dinosaurs 52 calcareous 52 erosional 52 coprolites 52 echidnas 52 limestone cave 52 Sedimentary 52 biota 52 marine invertebrates 52 igneous rocks 51 fossilized remains 51 intertidal zone 51 basalts 51 flora 51 gastropods 51 marine reptiles 51 crocodilian 51 mudflat 51 escarpments 51 functionally extinct 51 hadrosaur 51 Amazonian rainforest 51 snail shells 51 red ocher 51 fossil 51 Dry Valleys 51 tetrapod 51 aragonite 51 Ordovician 51 horned dinosaur 51 Lower Cretaceous 51 undescribed 51 underwater volcanoes 50 lake sediments 50 amphipods 50 coniferous trees 50 morphologically 50 trackway 50 Lapita 50 terrestrial ecosystems 50 planktonic 50 megafauna