So the age of the Zhuhai Formation is assigned toOligocene, the age of the bottom of the Zhujiang Formation is also Oligocene, and therest of the Zhujiang Formation is Miocene.

• 从而判定珠海组时代为渐新世,珠江组底部时代也属于渐新世,珠江组下部的其余层段归属于中新世。