我队在本区工作中,曾发现了在奥陶系地层中有一层铁矿。分布也较广,现把我们观察到的现象加以总结归纳,以便今后工作研究中参考。 在我队工作地区中,在公坪市、界牌垭、百城老关庙、郑家坪附近一带。在灰黑色的含矽质成份的中厚层灰岩中(下奥陶系的红花园地层中或在扬子贝层下部)夹有一层铁矿,位于层面间或节理中的土和黄土中间,成团块状和鸡窝状出现在地表,它的上层面是扬子贝层成中奥陶系的瘤状灰岩。 In our work in this area, our team discovered that there was a layer of iron ore in the Ordovician strata. Distribution is also wider, now we observe the phenomenon to be summarized, in order to work in the future reference. In my team work area, in Gongping City, Jiepaiya, Hundred Buddhism temple, near Zhengjiaping area. A layer of iron ore is sandwiched between gray-black, medium-thick limestone with siliceous composition (Lower Ordovician Red Garden Formation or lower part of Yangtze shell layer), intermediate between layers or between jointed earth and loess, Into the clumps and chickens appear in the surface, which is the upper layer of the Yan Bei into Ordovician nodular limestone.