Oxygen-isotope ratios in phosphate from fossil marine organisms.
Well-preserved fossil marine organisms generally yield very positive delta(18)(PO(4)(3-)) values which are considered to result from relatively good preservation of the original oxygen-isotope composition of phosphatic material deposited under isotopic equilibrium conditions in oceanic water whose O(18):O(16) ratio was more positive than that of modern oceans.
D000818:Animals; D008386:Marine Biology; D010103:Oxygen Isotopes / Q000032:analysis*; D010163:Paleontology; D010710:Phosphates / Q000032:analysis*
D010103:Oxygen Isotopes; D010710:Phosphates