File:Ant nest ichnofossil.jpg

Fig. 4. Preservation styles of trace fossils in the Marília Formation. A and B) Ichnofossils cemented by carbonate preserved in full relief. Note the yellowish and brownish color of the smooth wall in the lobed structures. Note also that the main shaft occurs in the middle of the structure, surrounded by the lobed structures indicated by arrows.


 * do Nascimento, D. L., A. Batezelli, and F. S. B. Ladeira. 2017. First record of lobed trace fossils in Brazil's Upper Cretaceous paleosols: Rhizoliths or evidence of insects and their social behavior? Journal of South American Earth Sciences. 79:364-376. doi:10.1016/j.jsames.2017.08.016