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分布在内蒙乌兰察布盟达尔罕茂明安旗阿木山一带的上石炭统,1955年原地质部某地质勘探队定名为阿木山组;同年有人称其为“拉老兔灰岩”。于内蒙作地质工作的同志,认为阿木山出露最为完整,更具有标准性,多用阿木山组一名。盛金章(1958)最早描述了在该区所采集的(虫筳)类化石4属8种。当时报道化石产地有二:一是阿木山,以产 Pseudoschwa gerina 为主;另一地点是拉老兔,以产 Triticites 为主。盛金章根据某地质队的野外观察
Distributed in Inner Mongolia Wulanchabu Union Darhan Maoming Anqi Amu Mountain area of the Upper Carboniferous, the original geological survey team in 1955 named the Amu group; the same year it was called “La La rabbit limestone” . Geological work in Inner Mongolia comrades, that Mount Amu exposed the most complete, more standardized, multi-use group A Mu Shan. Sheng Jin Zhang (1958) first described in the area collected (fossil) fossil genus 8 species. At that time there were two fossil origins: First, Mount Amu, to produce mainly Pseudoschwa gerina; the other is the Lao rabbit, to produce mainly Triticites. Sheng Jin Zhang according to a field team observation of the field