Early Cretaceous sea surface temperature evolution in subtropical shallow seas.

ABSTRACT: Late Cretaceous sea surface temperatures (SST) are, amongst others, traditionally reconstructed by compiling oxygen isotope records of planktonic foraminifera obtained from globally distributed pelagic IODP drill cores. In contrast, the evolution of Early Cretaceous SSTs is essentially based on the organic TEX₈₆ palaeothermometer, as oxygen-isotope data derived from well-preserved 'glassy' foraminifer calcite are currently lacking. In order to evaluate the extraordinary warm TEX₈₆-derived SSTs of the Barremian to Aptian (130-123 Ma) subtropics, we present highly resolved sclerochemical profiles of pristine rudist bivalve shells from Tethyan and proto-North Atlantic shallow water carbonate platforms. An inverse correlation of seasonal ontogenetic variations in δ¹⁸

SUBMITTER: Huck S 

PROVIDER: S-EPMC8492702 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature