Steuber, Thomas; Mitchell, Simon F.; Buhl, Dieter; Gunter, Gavin C.; Kasper, Haino U.
Author Affiliation, Ana.
Department of Geography and Geology
Catastrophic extinction of Caribbean rudist bivalves at the cretaceous-tertiary boundary
Geological society of America
Date of Publication
Strontium isotope ratios (87Sr/86Sr) in pristine low-Mg calcite of shells of rudist bivalves from the Titanosarcolites limestones exposed in the Central, Maldon, and Marchmont inliers of Jamaica indicate that species-rich rudist-coral associations persisted into the latest Maastrichtian (66-65 Ma). This finding contradicts the currently accepted hypothesis of stepwise extinction of rudist bivalves in the middle Maastrichtian and argues for a catastrophic, impact-related demise of Caribbean Cretaceous reefal ecosystems at the Cretaceous-Tertiary boundary.....