Related by context. Frequent words. (Click for all words.) 59 Ordovician 59 marine sediments 57 Late Cretaceous 57 Carboniferous 56 depositional 56 Pliocene 56 interglacial period 55 paleoclimate 55 volcanism 55 isotopic 55 biogeography 55 Quaternary 54 glaciation 54 magmatic 54 Mesozoic 54 abundances 54 terrestrial ecosystems 53 crustal 53 lavas 53 Holocene 53 Paleocene 53 basalts 53 Geochemistry 53 interglacial 53 ocean ridges 53 geologic 53 hydrothermal activity 53 bathymetry 53 Precambrian 53 isotopic composition 53 continental drift 53 poleward 53 Younger Dryas 53 morphologies 52 Cambrian explosion 52 Eocene 52 hydrothermal vent 52 oceanic 52 landforms 51 planktonic 51 oxygen isotopes 51 oceanic crust 51 trilobites 51 lithosphere 51 Pleistocene 51 Oligocene 51 plate tectonics 51 atmospheric methane 51 Paleozoic 51 Cretaceous 50 taxa 50 Cretaceous Period 50 glacial retreat 50 Proterozoic 50 paleo 50 tectonic 50 foraminifera 50 latitudinal 50 diatom 50 sediments 50 sediment cores 50 megafauna 50 biogenic 50 hydrological cycle 50 lake sediments 50 marine invertebrates 50 Computer simulations 49 solar irradiance 49 geomagnetic 49 morphological 49 Burgess Shale 49 subarctic 49 atmospheric CO 49 solar corona 49 basaltic 49 mass extinctions 49 prehistoric 49 anisotropy 49 Polar Regions 49 geomorphology 49 prokaryotes 48 Fig. 1A 48 sedimentary 48 lava tubes 48 Pacific Decadal Oscillation 48 Anomalous 48 supercontinent 48 continental crust 48 H. erectus 48 multicellular 48 diatoms 48 biogeochemistry 48 Tibetan Plateau 48 microfossils 48 Climatic 48 solar nebula 48 sedimentary basins 47 systematics 47 Morphology 47 abiotic 47 Triassic