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1978年,内蒙古地质局内蒙古区域地质调查大队在测区(国际图幅 L—49—128)内蒙古锡林郭勒盟苏尼特左旗红格尔公社之西南、哈达音布其地区,采到一批三叶虫标本交笔者进行鉴定和研究。化石采自奥陶纪乌宾敖包组,该组由灰黑色、灰绿色变质砂岩,粉砂岩、长石砂岩,石英长石砂岩,泥板岩,砂质板岩等组成,并夹有少量灰岩透镜体。出露厚度达5700米。三叶虫化石产于下部灰绿色粉砂岩中(野外号:3P25H1—11),个体众多,
In 1978, the Inner Mongolia Bureau of Geological Survey of Inner Mongolia Geological Survey Brigade in the survey area (international map L-49-128) Inner Mongolia Xilin Gol League Sunite Zuoqi Honggeer commune southwest, Hatta sound cloth area, to a group of three Leaf beetle specimen author to identify and study. Fossils from the Ordovician Wu Bin Obo group, the group from gray black, gray green metamorphic sandstone, siltstone, feldspar sandstone, quartz feldspar sandstone, mud slate, sandy slate and other components, and sandwiched a small amount of gray Rock lens body. Exposed to a thickness of 5700 meters. Trilobite fossils produced in the lower gray-green siltstone (wild number: 3P25H1-11), many individuals,