Signs of a past life
The present area includes a series of sub-vertically quartzite outcrops located at W of Vilarinho, from where it is possible to observe a significant amount and diversity of ichnofossils. This outcrops are the result of the deposition in a shallow marine environment, preserving several evidences of the living beings activity (ichnofossils), such as the traces of Cruziana resulting from the activity of arthropods.
In the big stratification surfaces of Vilarinho, it is important to refer the existence of traces, in particular the C. furcifera, with a linear behavior, that can reach over than 1 m length and it is sub-circular. Besides this, there are also other marks and traces, like C. rugosa, C. goldfussi, C. barriosi, Didymaulichnus isp., Monomorphichnus isp., Arenicolites isp., Daedalus halli or Skolithos linearis.