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塔里木盆地西部是我国中新生代有孔虫比较发育的一个地区。中生代后期特提斯海水自西侵入本区,在晚白垩世到第三纪一段较长的时间内保持了海盆的性质,这为本区有孔虫的发育提供了有利的条件。本区有孔虫比较丰富,自上白垩统到中新统各层段均有分布。经笔者鉴定各种类型的有孔虫共计76属278种。其中胶结壳有孔虫69种,占24.82％;似瓷质壳有孔虫9种,占3.24％;钙质微孔壳有孔虫200种,占71.94％,其中浮游有孔虫16种,占总种数的5.76％。
The western part of Tarim Basin is a region of Mesozoic-Cenozoic foraminifera that is relatively developed in China. The Tethys seawater intruded into the area from the west in the late Mesozoic, and maintained the characteristics of the basin for a long time from the Late Cretaceous to the Tertiary, which provided favorable conditions for the development of foraminifera in this area. The area is rich in foraminifera, from the Upper Cretaceous to the Miocene layers are distributed. By the author identification of various types of foraminifer a total of 76 genera and 278 species. Among them, there are 69 species of foraminifera in the cemented shell, accounting for 24.82%; 9 species of porcelain-like foraminifera, accounting for 3.24%; 200 species of calcareous microporous shell foraminifera, accounting for 71.94% of which 16 are planktonic foraminifera, 5.76% of the total species.