A new international research project will focus on the Cretaceous Period and its sedimentary rocks as a detailed record of global chemical and physical processes. The initiative has been proposed by a committee of the Global Sedimentary Geology Program (GSGP), which the International Union of Geological Sciences (IUGS) adopted in February 1987.
Impetus for the new program, called Cretaceous Resources, Events, and Rhythms (CRER), grew out of a recognition of the unique climatic history of the Cretaceous Period (65–135 m.y. B.P.), a time when several marine trangressions left marine sediments covering much of the planet. The relatively complete stratigraphy of the period in many parts of the world offers the opportunity to examine 70 million years of climate change on a global scale.