在不同区域的地质剖面中,有时埋藏有海相成因的富铀粘土页岩。它们在用伽玛测量石油和天然气的钻孔曲线图上,具明显的异常,此异常,可以用来对地质剖面进行区域性地球物理对此。富铀粘土页岩在不同地区和年代不同的沉积层中,其特点很相似。往往为暗灰色层状粘土,当含有很多植物残体、鱼骨和小鳞片时,则几乎为黑色。就其剖面和地区而言,这些粘土中的钙 Uranium-rich clay shale, sometimes marine in origin, is sometimes buried in geological sections of different regions. They have significant anomalies on the Gamma curve used to measure boreholes in oil and gas, which can be used to conduct regional geophysical surveys on geological sections. Uranium-rich clay shales have similar characteristics in different sediments of different regions and ages. Often dark gray layered clay, when it contains a lot of plant residues, fish bones and small scales, it is almost black. The calcium in these clays, in terms of their profiles and areas