Lithostromalion simplex, not present offshore, is consistently present onshore and seems to be confined to the Eocene shelf sediments of this region.

• 陆上剖面(古陆架)和海上剖面(古陆坡-陆隆)中的钙质超微化石组合面貌区别明显:前者连续出现Lithostromation simplex,并局限于始新统陆架沉积物中,未见于海上剖面。