ORIGINAL RESEARCH article
Front. Earth Sci.
Sec. Paleontology
A palynological assemblage of the Qingshankou Formation from the Wudaogou Section, eastern margin of Songliao Basin, and its implications of paleovegetation and paleoclimate
Provisionally accepted
- 1Daqing Oilfield Company Ltd Exploration and Development Research Institute, Daqing, China
- 2Northeast Petroleum University, Daqing, China
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The pollen and spores found in the Qingshankou Formation of Wudaogou Section, Bin County, Heilongjiang Province, northeastern China were studied systematically, and a palynological assemblages have been recognized, named as Lygodioisporites-Pinuspollenites-Cedripites. According to the palynological data, the strata in the Wudaogou Section are stratigraphically consistent with Member 1 of the Qingshankou Formation, and the geological time is constrained to the Turonian stage. On the basis of the palynological fossils, we can infer that during the depositional period of Member 1 of the Qingshankou Formation in the Bin County, the paleovegetation was mainly dominated by conifers forest, consisting primarily of Pinaceae, with rare Filicales growing on the forest floor; the paleoclimate was consistent with the subtropical zone of today, and the paleoenvironment was semi-humid. The results significantly provide biostratigraphic evidence for the division and correlation of Qingshankou Formation, and provide new data for analyzing paleovegetation and paleoclimate in the Songliao Basin.
Keywords: Paleovegetation and paleoclimate, Palynological assemblage, Qingshankou Formation, Songliao Basin, Wudaogou Section
Received: 03 Aug 2025; Accepted: 02 Jan 2026.
Copyright: © 2026 Li, Fu, Hao, Liang, Li, Wang, Yu and Yuan. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Junhui Li
Jiawei Hao
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