Related by context. Frequent words. (Click for all words.) 72 isotope ratios 66 oxygen isotopes 62 oxygen isotope 61 elemental composition 60 isotopic 60 isotopic composition 59 otolith 58 stable isotope 56 abundances 55 otoliths 55 marine sediments 55 radiocarbon 53 spectral signatures 53 medullary bone 52 uranium thorium 52 calcium phosphorus 52 oxidise 52 Fig. 1A 51 osmium 51 methylation patterns 51 coprolites 51 morphologies 51 zircons 51 marine invertebrates 51 morphology 51 noble gases 51 Neoproterozoic 50 amino acid sequences 50 placental mammals 50 radiocarbon dated 50 papillae 50 starch grains 50 lake sediments 50 Radiocarbon dating 50 microstructural 50 dentine 50 nanosized 50 microfossils 50 foraminifera 50 faunal 50 diatom 50 anionic 49 boron nitride 49 radiocarbon dating 49 histone modifications 49 Supplementary Fig 49 melanosomes 49 sorption 49 arsenate 49 biopsy specimens 49 morphologic 49 x ray diffraction 49 chemical composition 48 inorganic compounds 48 spectral signature 48 DNA helix 48 electron density 48 Cerling 48 radioactive decay 48 mRNA expression 48 snail shells 48 tooth enamel 48 serum albumin 48 aragonite 48 microbiota 48 mitochondrial genome 48 sodium potassium 48 Chlamydomonas 48 zeolites 47 ALH# 47 amphipods 47 morphological 47 braincase 47 cortical bone 47 apatite 47 radiocarbon dates 47 diatoms 47 osteocalcin 47 atmospheric CO 47 spherules 47 fluxes 47 carbonate minerals 47 histopathological 47 isotopes 47 morphologically 47 sediment cores 47 geochemists 47 colorimetric 47 stromal 46 microstructure 46 X ray fluorescence 46 immunostaining 46 particle sizes 46 monazite 46 serum calcium 46 supernatant 46 methanogens 46 myoglobin 46 Xenopus 46 immunoreactivity 46 interstellar clouds