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The thesis is based on fieldwork in the area of Picos de Europa, near the village of Arenas de Cabrales
(Cantabrian Mountains, Asturias - Northern Spain). The geology of this area is still not well known.
The first part of the thesis required mapping, and a geological map of a scale of 1:10.000 had
been produced. In the second part of the work, the evolution of the area will be pointe out. The age relationship
of the marine layers were determined with the help of fusulinids.
The Cantabrian Mountains are part of the Variscan Orogenic Belt of Europe. The belt is
characterized by thin-skinned tectonics. To get a complete section of the Carboniferous layers, the
area of the Sierra Dobros, located between two big overthrusts, had been chosen as the area of
fieldwork.
Mapping provided a continuous section of the Carboniferous units. With the help of the
biostratigraphy of fusulinids, a first complete section up to the Gzhelian of the Cantabrian
Mountains seems to be established.
The sequence starts with an Ordovician sandstone (Quartzite). The quartzite is directly overlain by
more than 1000 m of Carboniferous carbonates. It had been possible to correlate the different
carbonate units with other carbonate formations of Spain. The sequence of the area represents a
continuous evolution from a stable carbonate platform to an unstable platform, that had been
influenced by the progressing sedimentation of the Variscan orogenic front. A stadium of mud mound development
is of special interest.
The development of the paper for the "Diplom" (Masters)
The preliminary title:
The geology of the Sierra Dobros and the evolution during the Upper Carboniferous
(Picos de Europa, Asturias - Northern Spain).