Related by context. Frequent words. (Click for all words.) 74 oxygen isotopes 71 isotopic 69 isotopic composition 60 zircons 60 marine sediments 60 abundances 60 lavas 60 osmium 59 magmas 59 carbon isotope 59 foraminifera 58 stable isotope 58 solar nebula 58 aerosol particles 58 olivine 57 igneous rocks 57 radiocarbon 57 anisotropy 57 otoliths 56 lithosphere 56 electron density 56 basaltic 56 paleoclimate 56 atmospheric CO 56 spherules 55 solar irradiance 55 spectroscopic 55 iron oxides 55 ejecta 55 hydroxyl 55 silicates 54 microfossils 54 chemical composition 54 continental crust 54 spectral signature 54 deuterium 54 Fig. 1A 54 atmospheric methane 54 albedo 54 irradiance 54 calcite 54 basalts 54 anomalously 54 infrared spectroscopy 54 lake sediments 53 lunar soil 53 polar vortex 53 WASP #b 53 diatom 53 volcanism 53 crustal 52 diatoms 52 biogeochemical 52 morphologies 52 cuprates 52 melanosomes 52 dynamical 52 redshifts 52 apatite 52 galaxy formation 52 mid latitudes 52 stalagmite 52 magmatic 52 anion 52 temperature gradient 52 z = 52 silicate 51 sediment cores 51 planetesimals 51 water vapor 51 keV 51 radiative forcing 51 interglacial period 51 muon 51 nuclei 51 igneous 51 redshift 51 spectral signatures 51 GPa 51 igneous rock 51 oceanic crust 51 sediments 51 sodium potassium 51 latitudinal 51 Pliocene 51 photometry 50 serum calcium 50 SiO2 50 desorption 50 X ray emission 50 planetary nebulae 50 atmospheric circulation 50 sulphates 50 prokaryotes 50 glaciation 50 polar caps 50 magnetization 50 copper Cu 50 Chicxulub 50 radiative 49 oxygen atom