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新疆阿尔金山拉配泉地区石炭系上统下部，被命名为苦水河组，岩性为灰岩、砂岩、泥页岩夹少量硅质岩，含丰富的、非有孔虫、珊瑚、腕足类、海百合茎及钙藻化石。详尽地研究类化石后，可分为３个带：３）Ｐｒｏｆｕｓｕｌｉｎｅｌａｐｓｅｕｄｏｒｈｏｍｂｏｉｄｅｓ－Ｐｒｏｆｕｓｕｌｉｎｅｌａｐａｒａｒｈｏｍｂｏｉｄｅｓ带；２）Ｐｒｏｆｕｓｕｌｉｎｅｌａｐｒｉｓｃａ－Ｐｒｏｆｕｓｕｌｉｎｅｌａｏｖａｔａ带；１）Ｅｏｓｔａｆｆｅｌａｐｏｓｔｍｏｓｑｕｅｎｓｉｓ－Ｐｓｅｕ－ｄｏｓｔａｆｆｅｌａａｎｔｉｑｕｅｖａｒ．ｐｏｓｔｅｒｉｏｒ带。苦水河组可与新疆塔里木盆地西南缘的卡拉乌依组对比。
The lower part of the Upper Carboniferous system in the Lajinquan area of the Altun Mountains in Xinjiang is named as the “Shuishuihe Formation.” The lithology is composed of limestone, sandstone and shale with a small amount of siliceous rocks, with abundant clams, Brachiopods, sea lily stems and calcareous fossils. After a detailed study of the fossil, it can be divided into three zones: 3) Profusulinelapseudorhomboides-Profusulinelapararhomboides band; 2) Profusulinelaprisca-Profusulinelaovata band; 1) Eostaffelapostmosquensis-Pseu-dostaffelaantiquevar. Posterior band. The Qushuihe Formation can be compared with the Kalawu Formation in the southwestern margin of the Tarim Basin in Xinjiang.