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中国荆襄磷矿共有４个含矿层，自下而上分别为ｐｈ１、ｐｈ２、ｐｈ３和ｐｈ４，ｐｈ１是该区主要由磷质叠层石构成的最高品位的磷块岩。它不仅具有特征的化学成分和丰富的藻类化石，而巨其中的磷质主要富集在叠层石柱体、富藻层和藻化石中，磷的含量分别达到３６．９０％、３８．１０％和４０．０２％，而在叠层石柱间和富屑层中仅为３．２２％和１．３２％。这些资料表明，高品位磷块岩的凝聚和富集，主要是由古代生活在清水潮坪中的藻类生物代谢活动造成的生物和生物化学作用所致。
There are 4 ore-bearing formations in Jingxiang, China, which are ph1, ph2, ph3 and ph4 from bottom to top, respectively. Ph1 is the highest-grade phosphorite that is mainly composed of phosphorous-bearing strata. It not only has the characteristics of chemical composition and rich algae fossils, while the huge amount of phosphorus is mainly concentrated in laminated stone column, algal layer and algae fossils, phosphorus content reached 36.90%, 38.10% And 40.02% respectively, while only 3.22% and 1.32% among the laminated stone columns and in the enrichment layer. These data indicate that the aggregation and enrichment of high-grade phosphorite are mainly caused by the biological and biochemical effects of the algal bio-metabolic activities of ancient life in clear tidal flats.