Don Vicente Sos Baynat in its publication, "Geology, Mineralogy and Minerologenia of the Sierra de San Cristobal, Logrosán (Cáceres)" considered that the granite rock formations and the process mineralization that formed the Cerro de San Cristóbal occurred during three different stages. The first during the formation of Hertzian mountains about 250 million years, the second during the Alpine mountain building makes Approximately 50 million years.
Logrosán Granite is classified as two-mica leucogranite and porphyria with compound fenocrsito small amounts of quartz and feldspar, biotite, apatite and rutile, as well as some iron oxide. There are three areas on the north side and one on the west slope of Cerro kaolinized are composed of granite. Granite which comprises the Cerro de San Cristóbal is completely surrounded by shale and sedimentary rocks. The slate is considered Precambrian origin, or of about 700 million years. The granite of Cerro de San Cristobal is surrounded by a well-defined metamorphic aureole composed of clay slate. This halo was formed when the introduction of granite that forms the Hill made contact with the surrounding shale. The nearest granitic region is more than 20 km. Logrosán west and is located just west of the town of Zorita.
Logrosán Granite is classified as two-mica leucogranite and porphyria with compound fenocrsito small amounts of quartz and feldspar, biotite, apatite and rutile, as well as some iron oxide. There are three areas on the north side and one on the west slope of Cerro kaolinized are composed of granite. Granite which comprises the Cerro de San Cristóbal is completely surrounded by shale and sedimentary rocks. The slate is considered Precambrian origin, or of about 700 million years. The granite of Cerro de San Cristobal is surrounded by a well-defined metamorphic aureole composed of clay slate. This halo was formed when the introduction of granite that forms the Hill made contact with the surrounding shale. The nearest granitic region is more than 20 km. Logrosán west and is located just west of the town of Zorita.
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