Systematic and Taphonomic Study of Trichophycus pedum at the Soltanieh Type Section in SE of Zanjan

Diversification of trace fossils is due to the animal activity in the sedimentary environments. In addition to the variety of the behavior of animals, the mode of preservation of trace fossils leads to diversification of ichnofossils. Trichophycus pedum ichnospecies which is an index trace fossil of basal Lower Cambrian in Global Stratotype Section (GSS), has been recognized for the first time from the uppermost lower shale member of Soltanieh Formation and has been systematically studied. These studies suggest that the type of preservation of Trichophycus pedum led to polymorphism of this taxon, which in turn arises from the ethologically controlling factors and physical structures of sedimentary environments. Polymorphism of these ichnofossils leads to the introduction of the new style of preservation and sedimentary environments.