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Verfasst von:Wienberg, Claudia [VerfasserIn]   i
 Frank, Norbert [VerfasserIn]   i
 Schröder-Ritzrau, Andrea [VerfasserIn]   i
 Krengel, Thomas [VerfasserIn]   i
Titel:The giant Mauritanian cold-water coral mound province
Titelzusatz:Oxygen control on coral mound formation
Verf.angabe:Claudia Wienberg, Jürgen Titschack, André Freiwald, Norbert Frank, Tomas Lundälv, Marco Taviani, Lydia Beuck, Andrea Schröder-Ritzrau, Thomas Krengel, Dierk Hebbeln
E-Jahr:2018
Jahr:20 February 2018
Umfang:18 S.
Fussnoten:Gesehen am 17.03.2020
Titel Quelle:Enthalten in: Quaternary science reviews
Ort Quelle:Amsterdam [u.a.] : Elsevier, 1982
Jahr Quelle:2018
Band/Heft Quelle:185(2018), Seite 135-152
ISSN Quelle:0277-3791
Abstract:The largest coherent cold-water coral (CWC) mound province in the Atlantic Ocean exists along the Mauritanian margin, where up to 100m high mounds extend over a distance of ∼400km, arranged in two slope-parallel chains in 400-550m water depth. Additionally, CWCs are present in the numerous submarine canyons with isolated coral mounds being developed on some canyon flanks. Seventy-seven Uranium-series coral ages were assessed to elucidate the timing of CWC colonisation and coral mound development along the Mauritanian margin for the last ∼120,000 years. Our results show that CWCs were present on the mounds during the Last Interglacial, though in low numbers corresponding to coral mound aggradation rates of 16cmkyr−1. Most prolific periods for CWC growth are identified for the last glacial and deglaciation, resulting in enhanced mound aggradation (>1000cmkyr−1), before mound formation stagnated along the entire margin with the onset of the Holocene. Until today, the Mauritanian mounds are in a dormant state with only scarce CWC growth. In the canyons, live CWCs are abundant since the Late Holocene at least. Thus, the canyons may serve as a refuge to CWCs potentially enabling the observed modest re-colonisation pulse on the mounds along the open slope. The timing and rate of the pre-Holocene coral mound aggradation, and the cessation of mound formation varied between the individual mounds, which was likely the consequence of vertical/lateral changes in water mass structure that placed the mounds near or out of oxygen-depleted waters, respectively.
DOI:doi:10.1016/j.quascirev.2018.02.012
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1016/j.quascirev.2018.02.012
 Volltext: http://www.sciencedirect.com/science/article/pii/S0277379117304729
 DOI: https://doi.org/10.1016/j.quascirev.2018.02.012
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Coral mound
 Dissolved oxygen concentration
 Last glacial
 Mauritanian margin
 Mound aggradation rate
 South Atlantic Central Water
 Submarine canyon
 Uranium-series dating
K10plus-PPN:1692685287
Verknüpfungen:→ Zeitschrift

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