Detection of Late Cretaceous eustatic signatures using quantitative biostratigraphy. 2006. J. S. Crampton et al. GSA Bulletin 118: 975–990.
ice sheets, it is necessary to prove that sea-level fluctuations resulting from apparent changes in ice volume were global and synchronous.
In this paper we use a newly-developed quantitative approach to integrate very large amounts of paleontological data and to date the geological evidence for sea-level changes in New Zealand. We show that some Cretaceous sea-level changes in New Zealand were apparently synchronous (with 92% probability) with changes in eastern United States, thereby supporting hypotheses of Cretaceous polar continental glaciation in the Cretaceous greenhouse world.