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在内蒙古特颇格日图地区分布的大理岩出露于志留系徐尼乌苏组含砾砂岩或粉砂岩中,呈东西向线状断续展布,出露厚度不大,宽5～30m不等,长20～200m,多数为层状、似层状和透镜体状,有相当一部分与蚀变超基性岩呈侵入接触关系,其接触界线非常不规则。大理岩的岩石学特征显示,该大理
The marble distributed in the Turpo-Ritu area of Inner Mongolia is exposed in the silurian sandstone or siltstone of the Silurian-Xuyivu Formation in the Silurian, showing a discontinuous distribution in the east-west direction with a small thickness of 5-30 m Ranging from 20 to 200 m in length. Most of them are lamellar, stratified and lenticular, and a considerable part of them are intrusively in contact with the altered ultrabasic rocks. Their contact boundaries are very irregular. The petrological characteristics of marble show that the marble