Stratigraphy and structural geology of the district west of the Marimana granite, Valle de Aran

In the summer of 1953 and 1954 a detailed 1:25.000 map was made of a part of the central Pyrenees. The mapping ranged from Salardu (Valle d’Aran) to Mongarri, (northeast of Salardu). Thanks to a grant from the Molengraaff fund a special study could be made of the structural geology of this district in the summer of 1954. In the course of this study, particular attention was given to the complicated folding tectonics and numerous “minor structures” were measured and examined. This method made it possible in some cases to locate synclines and anticlines without seeing their hinges so that some of the stratigraphy could be reconstructed. The stratigraphical sequence as a whole remains doubtful however, as all the layers in the district are nearly vertical and visible folds remain scarce.