These data include comprehensive biostratigraphy charts and data sets of calcareous nannofossils, foraminifers and radiolarians built and interpreted to characterize the geologic age and depositional environment of the Paleocene Eocene Thermal Maximum (PETM) event in the Gulf of Mexico.Paleontology data for each of these wells is publicly available through one of the identified databases (URL's provided below). Data used in this study include calcareous nannofossils, foraminifers and radiolarians. The data sets are separate for each microfossil group, except foraminifers and radiolarians are compiled together. The datasets are provided in Comma Separated Values (.CSV) format, compatible with Microsoft Excel. All datasets provided are the full, original datasets submitted by the operator.The large PDF charts show the full suite of biostratigraphy data across the interval examined for this study including details regarding the determination of geologic age and depositional environment. These charts were produced using BugCAD software, a product of BugWare, Inc.Query for paleontology data from BSEE:https://www.data.bsee.gov/Other/DiscMediaStore/WellData.aspxQuery for paleontology data from IODP 364:http://iodp.pangaea.de/front_content.php?idcat=606