José Ignacio Canudo Sanagustín, José Malagón, Alfonso Meléndez Hevia, Héctor Alberto Millán Garrido, Eustoquio Molina Martínez, J. J. Navarro
The middle and upper Eocene marine sediments in the Sierras exteriores (Prepyrenes) are stu- died. Severa/ depositional sequences are recognized: Calizas de Guara Formation (SDI, SD2 and SD3), Margas de Arguis Formation (SD4,SD5 and Iower part of SD6) ahd Belsue-Atares Formation (SD6). Tentatively these sequences are correlated with the eustatic global cycles and their tectonic influence are analized
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