Sixteen samples collected for a biostratigraphic study of the Naopurdan Group in the Sulaimani Area to determine the age of its strata. The study succession is located within the Zagros High Fold and Thrust Belt. The lithology of the succession here is composed of marlstone, shale, siltstone, sandstone, marly limestone and a limestone bed. Hence, for the first time this limestone bed describes in detail; it is 4 m bed of brown, stiff, Alveolinidae-nummulitic limestone. It bears a frequent number of large benthic and planktic foraminiferas that are concentrated within the limestone bed. It is detected within the Naopurdan succession from Chwarta, Sulaimani area, Kurdistan Region/northeastern Iraq. The determined fossil assemblages in the bed includes both benthic and planktic foraminiferas. The identified-benthic foraminiferas are: Alveolina (Glomalveolina) levis, Alveolina elliptica, Alveolina aragonensis, Alveolina solida, Nummulites fabianii, Nummulites, Assilina spira and Assilina exponens. While the identified-planktic foraminiferas are: Acarinina (Globorotalia) esnaensis, Globigerinatheka mexicana, Globigerina venezuelana, Globigerinatheka kugleri, Globigerinatheka index, Catapsydrax martini, Subbotina triloculinoides and Subbotina triangularis. The biostratigraphic zonation of the succession confirms the Lutetian age/middle Eocene. It lies into the A. elliptica, Assillinoides exponens, Nummulites globulus Assemblage Zone and G. kugleri, G. index, G. venezuelana Assemblage Zone. This study demonstrates that the lithology of this limestone/condensed section is equivalent to the Avanah Formation of the Zagros Low Fold and Thrust Belt since they have similar lithology and fossil contents. This condensed section has not previously described within the fine clastics of the Naopurdan Group.

为 Sulaimani 地区 Naopurdan 群的生物地层学研究收集了 16 个样本，以确定其地层的年龄。研究演替位于扎格罗斯高褶皱和逆冲带内。这里的层序岩性由泥灰岩、页岩、粉砂岩、砂岩、泥灰灰岩和灰岩层组成。因此，第一次详细描述了这个石灰岩床；它是 4 m 的棕色、坚硬的 Alveolinidae-nummulitic 石灰岩床。它有大量的大型底栖和浮游有孔虫，它们集中在石灰岩床中。它是在来自库尔德斯坦地区/伊拉克东北部的苏莱曼尼地区的 Chwarta 的 Naopurdan 序列中发现的。确定的床中化石组合包括底栖和浮游有孔虫。已鉴定的底栖有孔虫是：Alveolina ( Glomalveolina ) levis、Alveolina elliptica、Alveolina aragonensis、Alveolina solida、Nummulites fabianii、Nummulites、Assilina spira和Assilina exponens。而确定的浮游有孔虫是：Acarinina ( Globorotalia ) esnaensis、Globigerinatheka mexicana、Globigerina venezuelana、Globigerinatheka kugleri、Globigerinatheka index、Catapsydrax martini、Subbotina triloculinoides和Subbotina triangularis。演替的生物地层分带证实了鲁特斯时代/始新世中期。它位于A. elliptica、Assillinoides exponens、Nummulites globulus组合带和G. kugleri、G. index、G. venezuelana组合带。该研究表明，该石灰岩/凝聚段的岩性与 Zagros 低褶皱和逆冲带的 Avanah 组相当，因为它们具有相似的岩性和化石含量。这种浓缩部分以前没有在 Naopurdan 群的细碎屑中描述过。