平邑盆地下第三系官中段核形石较为发育，类型多样。
Many types of oncoids are well developed in the Middle Member of the Guanzhuang Formation of Eocene in Pingyi Basin.
出现可染小体巨噬细胞，未见明显核仁或不规则核形。
Tingible body macrophages are present. No prominent nucleoli or irregular nuclear profiles are appreciated.
结果表明其由核心和叠层石包壳组成，具有核形石特有的结构和构造。
The structure and texture found in these nodules are characteristic of oncolite.
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