Abstract:El análisis bioestratigráfico permitió delimitar una edad que comprende desde el Berriasiano tardío (zona Calpionellopsis, subzona Oblonga) hasta el Valanginiano temprano (zona Calpionellites, subzona Darderi). Estos registros se compararon con los de otras regiones de América del Norte, América del Sur, Europa, África noroccidental y Asia occidental. Los calpionélidos proceden de la parte basal de la Formación Tamaulipas Inferior (Cretácico Inferior) conformada por lutita y caliza con textura mudstone y wacke… Show more
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