From the viewpoint of charophytes, the outcrop section of the Paomagang Formation in Dangyang, Hubei Province (Central China), contains the most continuous, abundant and diverse terrestrial biostratigraphic records of the Cretaceous-Paleogene transition, in particular the Early Paleocene, known so far in the world. The biostratigraphic record of ostracods in the transition is also very continuous, rich and diverse. Thus, this section meets critical requirements as a candidate for a boundary stratotype. The Dangyang section is the only outcrop section known so far in China that has potential to become a candidate for a global or regional continental stratotype of the Cretaceous-Paleogene (and Mesozoic-Cenozoic) boundary. It is also the best section for establishing the lowermost stage of the Paleogene or the Cenozoic of China. Therefore, the Dangyang section is undoubtedly worth further investigation in greater detail.
