Supplementary material 3. Gulf of Mexico biostratigraphic chart from the Bureau of Ocean Energy Management (BOEM), Regulation and Enforcement from the United States Department of Interior (https://www.data.boem.gov/Paleo/Files/biochart.pdf. Webpage accessed 15 November 2017.

Supplementary material 3. Gulf of Mexico biostratigraphic chart from the Bureau of Ocean Energy Management (BOEM), Regulation and Enforcement from the United States Department of Interior (<a href="https://www.data.boem.gov/Paleo/Files/biochart.pdf">https://www.data.boem.gov/Paleo/Files/biochart.pdf</a>. Webpage accessed 15 November 2017.