Lower Paleogene Chronostratigraphy: A Review

Although some unpublished planktonic foraminiferal zonations were being used for onshore subsurface Wilcox correlation prior to 1994, Rosen et al. (1994) was one of the first publications suggesting a tested zonation and relating it to relative changes of coastal onlap. Since 1994, hundreds of additional wells have been analyzed, resulting in the refinement of the zonation and a better understanding of the depositional environment.