Abstract
Ophosphate of fi sh teeth are ABSTRACT The δ 18 O compositions of well-preserved Jurassic fi sh otoliths from Wootton Bassett, UK, provide upper-ocean paleotemperatures that are comparable with those derived from the iso- topic analysis of fitooth phosphates, providing independent scrutiny of such paleotempera- tures. δ 18 O otolith temperatures in excess of 30 °C also rival temperatures associated with the middle Cretaceous thermal maximum. The negative carbon isotopes of the otoliths may point to a freshwater infl uence and potentially migratory nature of the fi sh. However, given the large departures from equilibrium fractionation toward more negative carbon values reported from modern marine fi sh, we consider our temperature interpretations to be robust and representa- tive of the marine depositional environment. Depleted δ 13 C values, we believe, suggest that the otoliths examined in this study belong to fiwith high metabolic rates.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
