extensive carbonate platform system that rimmed the ancestral Gulf of Mexico during
Barremian to Albian time. Exposures of Cupido and Coahuila lithofacies in several mountain
ranges spanning an∼ 80 000 km2 area reveal information about platform morphology and
composition, paleoenvironmental relations, and the chronology of platform evolution. New
biostratigraphic data, integrated with carbon and strontium isotope stratigraphy, significantly …