Abstract：Graphoglyplids trace fossils were found in turbidite mudstones in the 3rd member of Shahejie formation in Dongpu Depression and confirmed that they belong to Paleodictyon of Agrichnia, attributted to P. ( Glenodictyon) and P. ( Squamodictyon) sub-ichnogenus respectively. By the comparison to relevant published information, the authors suggest that the trace fossil specimens found in the study area are marine ones, which means that in Paleogene exists marine environments. This is an important evidence to prove that in the Dongpu Depression and even all Bohai bay basin there exist transgressions in Paleogene. It is of significant for environmental analysis and oil as well as gas exploration in this basin in future.

Keyword：paleogene;Shahejie formation;graphoglyplids trace fossils;Paleodictyon;Dongpu depression;