García Hidalgo, J. F.2017-11-072017-11-071992http://hdl.handle.net/10272/14128New discovery of trace fossils in the Upper Alcudian of the Ibor anticline indicate that its supposed Precambrian age should be maintained but tentatively, due to the presence of scarce Lower Cambrian trace fossils although their distinction is problematic. Other fossil data, micro and macroflora, are also revisedspaAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Trace fossilsUpper AlcudianPrecambrianLower Cambrianjournal articleopen access