Benthic oxygen isotopes, Zr/Al and grain size fractions over the Miocene-Pliocene boundary in the Gulf of Cadiz, supplement to: Van der Schee, Marlies; Sierro, Francisco Javier; Jiménez-Espejo, Francisco J; Hernandéz-Molina, Francisco Javier; Flecker, Rachel; Flores, José-Abel; Acton, Gary D; Gutjahr, Marcus; Grunert, Patrick; García-Gallardo, Ángela; Andersen, Nils (2016): Evidence of early bottom water current flow after the Messinian Salinity Crisis in the Gulf of Cadiz. Marine Geology, 380, 315-329


During the latest Messinian, hemipelagic sediments exhibiting precession-induced climate variability were deposited. These are overlain by Pliocene sediments deposited at a much higher sedimentation rate, with much higher and more variable XRF-scanning Zr/Al ratios than the underlying sediment, and that show evidence of winnowing, particle sorting and increasing grain size, which we interpret to be related to the increasing flow of MOW. Pliocene sedimentary cyclicity is clearly visible in both the benthic d18O record and the Zr/Al data and is probably also precessionally controlled. On the basis of these results, we conclude that contouritic sedimentation, associated with weak Mediterranean-Atlantic exchange, began in the Gulf of Cadiz virtually at or shortly after the Miocene-Pliocene boundary, with two contouritic bigradational sandy-beds within the fourth precession cycle after the Miocene-Pliocene boundary.

Metadata Access
Creator Acton, Gary D;Hernandéz-Molina, Francisco Javier;Grunert, Patrick;Andersen, Nils;Flecker, Rachel;Gutjahr, Marcus;Jiménez-Espejo, Francisco J;Van der Schee, Marlies;Sierro, Francisco Javier;García-Gallardo, Ángela;Flores, José-Abel
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2016
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Discipline Earth System Research
Spatial Coverage (37N,8 W)