名 称：木纹石

岩性特征：又名木纹玉，是具有天然木质纹理的石材之通称。岩性为富铁质泥质白云岩。由浅紫红色微细晶含铁白云岩和浅黄色细晶白云岩交替出现构成，主要由于铁质含量差异所致，常见大小不等的椭圆形或不规则同心环，俗称“木纹石”。

层 位：下奥陶统亮甲山组，形成于距今约4.7~5.8亿年前。

主要用途：是较名贵的饰面石材及雕件材料

采集地点：鄂尔多斯市准格尔旗敖包梁城塔

Name：Serpenggiante

Characteristics：Also named as Serpenggiante jade, with natural year rings of wood, lithologically composed of iron-rich marl dolomite. It consists of interbedding light purple-reddish crystalline dolomite and light yellowish dolomite, and the color variation is due to iron concentration. The name “Serpenggiante” comes from the concentric rings.

Stratigraphy：Lower Ordovician Liangjiashan Formation(470-580 Ma)

Usage：High quality dimension stone and also used for sculpture-caving

Sample site：Aobaoliangchengta, Zhugeer, Inner Mongolia