Marine uppermost Cretaceous and Garumnian facies in the region of Boixols-Coll de Nargó Anticline (prov. Lérida. Spain)

H. Willems

doi:10.3989/egeol.85411-2686

Marine uppermost Cretaceous and Garumnian facies in the region of Boixols-Coll de Nargó Anticline (prov. Lérida. Spain)

Authors

H. Willems Geologisch Paläontologisches Institut der Johaan Wolfgang Goethe Universität

DOI:

https://doi.org/10.3989/egeol.85411-2686

Keywords:

Paleogeography, paleoecology, synsedimentary tectonic, biostratigraphy, foraminifera, Upper Cretaceous- Lower Tertiary (Campanian-Maestrichtian-«Garumnian»), Spain, Pyrenees.

Abstract

The lithostratigraphic evolution of marine uppermost Campanian-Maestrichtian (Arén Sandstone Formation) and of lagoonal and continental Maestrichtian-Paleocene "Garumnian" facies (Tremp Formation) on the southern margin of Boixols-Coll de Nargó Antic1ine was studied. Dating, based mainly on orbitoidal forarninifera, indicates that the formations are diachronous and become younger from west to east. The transgression of the formations from south, respectively southwest upon Campanian 10 Santonian units, their tapering out northward , and the change in the pebble spectra (from San tonian lo Aptian) of the conglomeratic layers reflect the elevation and denudation of the anticline uplift area ("island") at the Cretaceous-Tertiary boundary.

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Published

1985-04-30

How to Cite

Willems, H. (1985). Marine uppermost Cretaceous and Garumnian facies in the region of Boixols-Coll de Nargó Anticline (prov. Lérida. Spain). Estudios Geológicos, 41(1-2), 17–24. https://doi.org/10.3989/egeol.85411-2686

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Issue

Vol. 41 No. 1-2 (1985)

Section

Articles

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