Discovery and Significance of Paleodictyon of Paleogene in Dongying Sag

Abstract

Abstract: The trace fossil Paleodictyon characterized by high abundance and low distinctness was discovered in Shahejie formation of Paleogene in Chunliang area of Dongying sag. Observation indicates that Paleodictyon in lacustrine environment has much smaller the string width and the mesh diameter than that in marine environment, and tends to being irregular in mesh pattem. The fabric analysis suggests that the Paleodictyon should be formned in deeplake -hemilake environment concerning with the turbidity current. This conclusion enriches and perfects the environmental significance of Paleodictyon.

Key words: Dongying sag, Paleogene, trace fossil, turbidite deposit, sedimentary environment

CLC Number:

WANG Hai-fang, HU Bin, ZHANG Guan-long, CHEN Shi-yue, YAN Ji-hua. Discovery and Significance of Paleodictyon of Paleogene in Dongying Sag[J]. Xinjiang Petroleum Geology, 2005, 26(4): 404-407.

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