Early Oligocene marine transgression and organic matter accumulation recorded in the upper Eocene to lower Oligocene Enping Formation of the Baiyun Sag, Pearl River Mouth Basin, South China Sea - Lu, Xiaolin; Li, Meijun; Li, Youchuan; Yang, Yongcai; Yang, Haizhang; Wang, Ning; Ran, Zichao; Ali, Sajjad (Journal of Asian earth sciences, 2024)