Sarmatio

The term "Sarmatio" refers to a proposed geological period within the Neogene Period. It is typically defined as a regional stage of the Paratethys Sea, a large inland sea that existed from the Oligocene to the Pleistocene epochs. The Sarmatian Stage roughly correlates with parts of the Miocene Epoch and extends into the Pliocene.

The Sarmatian Stage is characterized by specific fossil assemblages, particularly ostracods and mollusks, that reflect the changing salinity and environmental conditions of the Paratethys Sea during that time. The term is primarily used in Eastern European geological literature, particularly in the context of studying sedimentary layers and paleoenvironments of the Paratethys region.

Debate continues on the precise boundaries and subdivisions of the Sarmatian, as well as its correlation to globally recognized geological stages. Different researchers and national geological surveys have proposed varying definitions and durations for the Sarmatian Stage. Factors contributing to these discrepancies include regional variations in sedimentation, fossil preservation, and differing biostratigraphic interpretations. Therefore, the use of "Sarmatian" requires careful consideration of the specific context and regional geological framework.