Marine organic walled micro fossils at the cretaceous tertiary boundary in the barranco del gredero southeastern spain

D.C.ninck J.; Smit, J.

Geologie en Mijnbouw 61(2): 173-178

1982


Accession: 005853505

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Abstract
Assemblages of marine organic-walled microfossils were studied in 4 samples (SM 75-502, -504, -505 and -506) that represent the Maastrichtian-Danian boundary layers in the Barranco del Greders (Spain). No sharp changes can be seen in their composition and the marine organic-walled microfossils give no indication at which level the Cretaceous-Paleocene boundary should be placed at that location.