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林县位于河南省北部,地处太行山东麓,毗邻山西、河北两省。前人在该区所划下奥陶统无任何古生物依据。近年,笔者等在林县首次发现了下奥陶统冶里组和亮甲山组牙形石,同时在亮甲山组底部还发现了一层砾岩、含砾白云岩,其上下地层之间缺失几个牙形石带,故认为砾岩代表一次沉积间断,对认识华北地台南部早奥陶世的沉积历史具有一定意义。
Lin County is located in the northern part of Henan Province, is located in the eastern foot of Taihang Mountain, adjacent to Shanxi and Hebei provinces. The predecessors in the area planted under the Ordovician without any paleontological basis. In recent years, the authors first found the Lower Ordovician Yeli Formation and Liangjishan Formation in Linxian. At the same time, a layer of conglomerate and pebble dolomite was found at the bottom of the Liangjianshan Formation, with the missing between the upper and lower strata Several conodont belts, so that conglomerate representatives of a deposition interval, to understand the history of the South China Precambrian sedimentary history of great significance.