According to the materials in X ray diffraction of degenerated plants,loess and paleosols,we know that the degenerating process of plant can form various clay mineral,and the longer the degenerating process is,the more the clay mineral formed is.The clay mineral formed by plants exists mainly in the form of clay film,and it is optically oriented clay film observed by microscope.The clay film in loess and paleosols is simil...
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