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克拉麦里山位于新疆准噶尔盆地东缘,其南麓有一套滨一浅海相地层,呈北西一南东向条带状分布。岩性为灰岩、生物灰岩、泥灰岩、砂质灰岩与粉砂岩不均匀互层,靠下部砂砾岩增多。灰岩中含大量海相动物化石。1930年,袁复礼教授将其划分为下石炭统双井子石灰岩层以及双井子南下二叠统石钱滩建造。1655年地质部631队朱夏等、1959年新疆地质局第一区测大队和1961年第三区测大队以及1963年新疆石油局等都将其划为上石炭统。1963年至1964年.新疆区测大队一分队在该区进行二十万分之一区调工作时,笔者和陈敬培等到双井子一带的灰岩中采集蜓类化石,切到了Eostaffella Sp.及Pseudostaffellasp.同年一分队在双井子东Ⅰ号剖面的岩石薄片中亦发现了:Profusulinella sp.,P.
Kalamaili Mountain is located in the eastern edge of Junggar Basin in Xinjiang, the south there is a set of coastal shallow marine facies, was north-west-south strip distribution. Lithology is limestone, bio-limestone, marl, sandy limestone and siltstone are not interbedded with each other, and the lower glutenite is increased. Limestone contains a large number of marine animal fossils. In 1930, Professor Yuan Fu-li divided it into the Lower Carboniferous Shuangjingzi Limestone Formation and the Lower Permian South Permian Shixiantan. In 1655, Zhuhai and other 631 teams of the Department of Geology, 1959 Xinjiang Geological Bureau of the first test team and the third district in 1961, the brigade and the Xinjiang Petroleum Bureau in 1963 and so on will be classified as the Carboniferous. From 1963 to 1964. When a detachment of the Xinjiang Measurement Brigade carried out one-hundredth district adjustment in the area, the author and Chen Jingpei collected the flies from the limestone in the Shuangjingzi area and cut them into Eostaffella Sp. And Pseudostaffellasp In the same year, a unit was also found in the rock slices of the Shuangjingzidan Ⅰ profile: Profusulinella sp., P.