@article{10272/9334, year = {2002}, url = {http://hdl.handle.net/10272/9334}, abstract = {This paper deals with the Arroyo Farandón (Asturias) igneous sills, which intruded within the sedimentary rocks of Oville Formation. They have alkaline composition and are classified as trachytes. As a consequence of a new detailed survey, continuous zonation has been distinguished along the main sill, which show outstanding developing of vesicular-amigdalar zones at the top and bottom of the body, suggesting vesiculation processes controlled by temperature gradients. Slight geochemical variations across the sills have been recorded}, publisher = {Sociedad Geológica de España}, keywords = {Traquita alcalina}, keywords = {Vesículas-amígdalas}, title = {La diferenciación petrográfica y geoquímica de las rocas ígneas del Arroyo Farandón (Asturias)}, title = {Petrographic and geochemical differentiation of the igneous rocks from Arroyo Farandón (Asturias)}, author = {Barrero, M. and Corretgé Castañón, Luis Guillermo}, }