The Maoming Basin belongs to a half graben-like faulting basin of extension regime.The oil shales are found both in the Palaeogene Youganwo Formation and in the Neocene Shangcun Formation.

• 摘要茂名盆地为伸展作用下形成的半地堑式断陷盆地，油页岩发育于古近系油柑窝组和新近系尚村组中。