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将德国南部法郎垦地区上侏罗系麻姆统碳酸盐岩中的酸不溶残余物用Atter－bery—Zylinder法分为两种组分，即大于2μm的粉砂级组分和小于2μm的粘土级组分。并各自用X-衍射分析确定了其矿物组成。研究表明，各种矿物均含有不同的成因信息。
The acid-insoluble residues in the upper Jurassic Maimoto carbonate rocks in the southern Franconian region of southern Germany were divided into two components by the Atter-bery-Zylinder method, namely silt fraction greater than 2 μm and silt fraction less than 2 μm Clay component. Their mineral compositions were determined by X-ray diffraction. Research shows that various minerals contain different genetic information.