Strontium isotope stratigraphy is a geologic tool used to date sediments that are generally undatable by other means. This site provides a list of publications related to strontium isotope stratigraphy, the global seawater strontium curve and specific applications of this dating method including strontium isotope stratigraphy of the Cretaceous/ Tertiary Boundary. Contact information for several strontium isotope experts are also provided.