It was noted that the Upper Mesozoic strata (mainly Cretaceous) as revealed by drill or dredge from the eastern Nansha w南海裂谷期间形成的下第三系具有明显的裂谷充填特徵，其构成生油岩主体。
Fossil woods from coal-bearing strata of Upper Mesozoic in central and eastern Jilin,China吉林省中东部晚中生代含煤地层中的木化石