Sedimentary and Stratigraphic Description of the Castellón B Borehole Cores

(Offshore Western Mediterranean)

verfasst von

Telm Bover-Arnal, Carles Ferràndez-Cañadell, Julio Aguirre, Ulrich Heimhofer, Mateu Esteban

Abstract

The Castellón B-1, 2, 3, 4, 11, and 12 cores were studied to establish the precise age and the stratigraphic framework of the Cenozoic offshore sedimentary succession from eastern Iberia. Six stratigraphic units were recognized: (i) a Black Sandstone Unit, (ii) a Red Beds Unit, (iii) the Alcanar Conglomerates, (iv) the Tarraco “Shale,” (v) the Amposta Limestone, also known as “Amposta Chalk,” and (vi) the San Carlos Group. The Black Sandstone Unit corresponds to non-fossiliferous slightly foliated fault breccias that resemble the Carboniferous Scala Dei Formation cropping out in the Priorat area (onshore Catalonia, NE Spain). The Red Beds Unit consists of fine-grained sandstones and red clays containing Classopollis sp. pollen grains, which range from the Late Triassic to the Paleocene. According to the known stratigraphy of onshore deposits from eastern Iberia, they are comparable with the red beds of the uppermost Cretaceous-Paleocene Mediona Formation. The Alcanar Conglomerates are mainly made up of Paleozoic clasts indicating the existence of nearby subaerially exposed Paleozoic rocks. The Tarraco “Shale” is made up of siliciclastic-influenced wackestone-packstone textures with planktonic foraminifera. Above, the Amposta Limestone comprises platform carbonates rich in coralline red algae, as well as larger benthic foraminifera including Borelis sp., Heterostegina sp., Amphistegina mammilla, and Amphistegina bohdanowiczi. The foraminiferal association suggests an early-mid Langhian age. The drowning of the Amposta Limestone is marked by the deposition of the planktonic foraminifera-rich deposits of the lower part of the San Carlos Group.

Organisationseinheit(en)

Institut für Geologie

Externe Organisation(en)

Universitat de Barcelona
University of Granada

Typ

Aufsatz in Konferenzband

Seiten

47-50

Anzahl der Seiten

4

Publikationsdatum

20.03.2024

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Architektur, Umweltchemie, Erneuerbare Energien, Nachhaltigkeit und Umwelt

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1007/978-3-031-48758-3_11 (Zugang: Geschlossen)