16. Nummulites along the Faja de las Flores




    This is a concentrated site on a path. The Faja de las Flores is in fact a layer of carbonate mud that is poorly cemented and which is full of small nummulites measuring between 1 and 3 mm in diameter. The entire stratum is prone to erosion and has created the strip along which the path runs. Geological unit T1.


    The Upper Palaeocene (Thanetian Stage), corresponding to the middle section of the Gallinera Formation, has large numbers of four or five species of foraminiferans.

    The sole of the Eocene (Ilerdian Stage) has a large radiation, with the sudden appearance of at least 15 new and very plentiful species, among them nummulites, alveolinas, assilinas and others.

    This radiation is expressed in the study zone in the great abundance of nummulites in the Faja de las Flores, a stratum that extends throughout almost the entire Ordesa Park and many other spots in the inland mountain ranges in Aragon.

    The point described is one of the most important for observing and describing them. The Faja de las Flores is one of the most popular paths in the National Park and undoubtedly one of the most spectacular due to its steepness.


    From the Salarons Valley and up the pitons on a path for expert climbers who have a good head for heights. The Faja de las Flores path is not advisable for people who suffer from vertigo.

    The site coordinates are those for the start of the Faja de las Flores path, at the UTM coordinates 31T 248931 4728719. The concentration of nummulite fossils remains largely the same along the whole path, extending for just over 2 km.