LOWER TRIASSIC ICHNOFOSSILS AND SEDIMENTARY ENVIRONMENTS IN THE DENGFENG AREA, WESTERN HENAN PROVINCE
The Lower Triassic Liujiagou and Heshanggou formations in the Dengfeng area consist of fluvial and lacustrine deposits.On the basis of sedimentary characteristics,8 types of sedimentary sequence were established.Additionally,many continental ichnofossils,including at least 8 ichnogenera and 10 ichnospecies,have been recovered.Three ichnoassemblages have been recognized including,1) the Scoyenia ichnoassemblage in very shallow and periodically exposed flood plains land and overbank environments,2) the Arenicolites ichnoassemblage in lakeshore environment where water levels fluctuated frequently,and 3) the Taenidium-Planolites ichnoassemblage in the relatively calm shallow lacustrine environment.Based on a comprehensive analysis of sedimentary and ichnofossil data,a sedimentary environment model of ichnoassemblages is proposed for the Early Triassic strata in the study area.
NETL
NSTL
万方数据
维普
