Petrología de la granodiorita de Peña Prieta (León, Santander, Palencia)

The granite autcrops of Peña Prieta situated on the harder of the Provinces of León, Santander and Palencia, are 1)etrologically studied in this work. This rock is a postectonic granodiorite with biotite and hornblende. The intense microtectonization in the mica is to he particularly noted in contrast with the remaining mineral components. The paragenetic relationship of the amphibol are also discussed