Abstract：In order to study the evolution characteristics of trace fossils and their sedimentary environments in carbonate rock of the Carboniferous-Permian Taiyuan formation at Jiaozuo and Yuzhou in Henan province,using ichnologic and sedimentologic methods,it was highlighted in the analyses of the occurence,distribution,size,infilling color variations of Zoophycos and the sedimentary environments of its host rocks,and primarily explored the rules of Zoophycos as the regional correlation markers of sedimentary environments and the evolution laws of transgressions and regressions.Three aspect results are that:(1) there is relationship between the densly distributed small remnant individuals and black Zoophycos fillings and the deep water environment and the poor environment;(2) the trace fossil Zoophycos may act as palaeo-bathometric indicators,especially,the small ones and black infillings can work as the correlation markers of the rock layers deposited in deeper waters,according to the regional comparative analysis of this sign,it is suggested that the Taiyuan formation experienced two major transgression,two times the maximum flooding surface,and can be used as the interface;(3)in accordance with the regional temporal and spatial correlation of the sedimentary environments in region,the change tendency of ingression and regression in this area is suggested.In general,the Taiyuan formation in the study area consists of two time transgression and regression cycles.Each cycle begins with bay and / or lagoon environments,intercalated with tidal flats and sandy barrier islands,and then evolved intoproximal-distal-proximal shallow seas,intervened by tidal flats and / or swamps,and finally turned into bay-lagoon and tidal flatswamp environments.

Keyword：western Henan;Carboniferous-Permian;Taiyuan formation;Ichnofossil;Zoophycos;sedimentary environment;