Stratigraphic comparison between western South Sulawesi and eastern South Sulawesi. The Tonasa Formation was deposited from the Middle Eocene to Early Miocene in western South Sulawesi. Modified from Wilson and Bosence (1996).

 
 
  Part of: Farida M, Jaya A, Ahmad A, Nugraha J (2024) The Eocene to Oligocene boundary and paleoclimatic indications based on calcareous nannofossils of Tonasa Formation, South Sulawesi, Indonesia. Fossil Record 27(1): 221-231. https://doi.org/10.3897/fr.27.96985