The first spreading cycle resulted in the formation of Wenchang mudstone, Eocene,which is the important and main source rock of the basin. 第一扩张旋回中形成的始新统文昌组泥岩是珠江口盆地的主要烃源岩。
Based on the researches of Neogene calcareous nannofossils from the Pearl River Mouth Basin, this paper briefly reviews the researching and developing process. 摘要根据珠江口盆地新近系钙质超微化石研究文献，综述了研究内容及发展过程。
