The structure and texture found in these nodules are characteristic of oncolite.
结果表明其由核心和叠层石包壳组成，具有核形石特有的结构和构造。
Oncolite color with gray and brown, the shape of oncolite is globosity, ellipsoid, oblatus and tuberose.
核形石颜色以灰色、棕褐色为主，有球状、椭球状、扁球状和不规则状。
Oncolite color with gray and brown, the shape of oncolite is globosity, ellipsoid, oblatus and tuberose.
核形石颜色以灰色、棕褐色为主，有球状、椭球状、扁球状和不规则状。
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