 The main objective of the study was to determine the age and paleontological characteristics of the cubilac formation of the lower Lena River. Researchers disagreed as to whether the formation belonged to the upper carboniferous or the base of the Permian based on its biostratigraphic data. However, the paleontological characteristics of the formation were often inconsistent. In order to clarify the lithology of the section and identify the representative paleontological material, the cubilac formation was studied near the mouth of the cubilac creek in the lower reaches of the Lena River. The following species were identified in the lower part of the formation. Jicuoproductus protovercoeanicus castchersu, verkegenia avrimovii macchishin, verkegenia cf monstrosis, ganylin, cancranella, alizia kazavadowsky, and torinquistia columnensis affinashiva. These species indicated that the formation belonged to the jicuoproductus protovercoeanicus zone of the kigiltasian regional stage of the vercoenus region. Additionally, the upper part of the this article was authored by six macchishin and rvcutogen we are article dot tv links in the description below.