科古琴山南坡苏拉峡—彼里克溪—科克萨依—科马姆达坂等地区出露有一套酸—基性火山岩系,前人曾将其划为晚泥盆世。笔者等于1985—1986年在该区进行1:20万填图找矿工作,在上述地区火山岩夹层中发现四处化石点,产较丰富的床板珊瑚和腕足、三叶虫等化石。经王宝瑜等鉴定其时代为中志留世,可与邻区同时代地层对比。一、地层剖面 On the southern slopes of the Kigqin Mountain, there are a series of acid-base volcanic rocks exposed in the Sula Gorge-Bixikexi-Coxhaikei-Kemamu Daban area. Previously, they were classified as Late Devonian. The author is equivalent to 1: 200,000 mapping and mapping work in the area from 1985 to 1986, where fossil sites are found in volcanic intercalations in the above areas, producing relatively abundant bedplate corals, brachiopods, trilobites and other fossils. By Wang Baoyu and other identification of its era for the Middle Ages left, with the neighboring areas of contemporary stratigraphic contrast. First, stratigraphic section