M. Lucini, Trinidad de Torres Pérez-Hidalgo, Juan Francisco Llamas Borrajo, Laureano Canoira López, José Eugenio Ortiz Menéndez, M.A García de la Morena
Biomarquer analytical results from Cainozoic age organic rich lutites from Duero and Ebro basin drill holes are presented. The presence and abundance of n-alkane, n-metil ketones, n-etil-ketonés, n-butil ketones and elemental sulphur are compared. Samples from Ebro basin bore hole core (PE-1) reveal alternances of "terrestrial" and "acuatic" lacustrine environmental conditions (shallowing versus deepening conditions) while samples from Duero basin borehole core (VS-1) show a constant "terrestrial (shallow) character
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