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陡山沱期的鄂西台地东部是一个重要的大型磷矿产出区域，其沉积磷矿床以各种类型的生物泥丘存在，生物泥丘为磷矿床的容矿体并直接控制着矿床的形态和品位。研究表明，水体中富磷营养化特殊环境导致了局部地段生物群落的超速繁殖，其代谢活动极大地抑制了水体中碳酸盐的沉积掺和作用而使其中的磷酸盐优先沉积富集形成泥丘。不同泥丘分别形成于正常清水潮坪、局限还原浅滩和广海高能带等环境中，其微生物群落组合也相应从以底栖藻类为主，至底栖、漂浮混合到底栖、漂浮、高级藻类复合型等变化，从而形成本区Ⅰ、Ⅱ和Ⅲ三种类型不同的生物泥丘磷块岩矿床。
In the Doushantuo period, the eastern western Hubei plateau is an important large-scale phosphate rock production area. Its sedimentary phosphate deposits exist in various types of biological mud mounds. The biological mud mounds are the ore-bearing bodies of the phosphate deposits and are directly controlled The shape and grade of the deposit. Studies have shown that the special environment of phosphorus-rich eutrophication in water leads to the over-propagation of biotic communities in local areas, and its metabolic activity greatly inhibits the sediment-mixing effect of carbonates in the water so that the phosphate preferentially accumulates and forms mud mounds . Different mud mounds were formed in the environment of normal tidal flat, shallow tidal flat and high-energy zone of Guanghai, respectively. The microbial community assemblage also varied from benthic algae mainly to benthic and floating mixed to benthic, floating and algae Complex type and other changes, thus forming the area Ⅰ, Ⅱ and Ⅲ three types of different biological mud mound phosphorite deposit.