Sea-level highstands during the last interglacial in Mallorca.
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1 Sea-level highstands during the last interglacial in Mallorca. T. Lorscheid, P. Stocchi, A. Rovere, L. Gómez-Pujol, B. de Boer, T. Mann, H. Westphal, J. J. Fornós Workshop global and regional sea level variabilities and change Palma de Mallorca This research has been funded by the Institutional Strategy of the University of Bremen, funded by the German Excellence Initiative, and ZMT, the Leibniz Center for Tropical Marine Ecology. More information on the SLCC group can be found at
2 Outline Introduction Indicative Range (IR) and Relative Water Level (RWL) Fieldwork Description of some sites First results of IR/RWL for Mallorca Outlook Dating GIA
3 Why the Last Interglacial? The Last Interglacial provides information about sea-level in a slightly warmer world. No overprint Low alteration LISIECKI & RAYMO 2005 MIS 5e 9e 11 today
4 Fieldsites
5 Paleo relative sea-level marker Feature representing a distinct range above/below a relevant sea-level datum biological sedimentological morphological Photos: Casella 2015
6 Paleo relative sea-level marker Reference Water Level (RWL) Indicative Range (IR) ROVERE & RAYMO 2014 accuracy of ± 5cm with real-time corrections Photos:
7 Modern analog Photos: Lorscheid 2014 Measurement of subaerial boundaries Calculation of submarine boundaries from hydrodynamics ROVERE & RAYMO 2014
8 Fieldsites
9 Beach deposits 8 sites Sandy beach deposits Many fragmented shells Layers up to 150 cm Contain Senegalese fauna Large indicative range 2,22 ± 0,60 m apsl 0,98 ± 1,01 m apsl 1 Camp de Tir 7 Cala Millor Photos: Lorscheid 2015
10 Biological marker 4 sites Lithophaga boreholes Vermetids & Serpulids Mostly connected to boulders in beach deposits Very narrow indicative range 3,97 ± 0,25 m apsl 2,22 ± 0,60 m apsl 3,96 ± 0,61 m apsl 4 Cala Pi Photos: Casella Camp de Tir 11 Platja Sant Joan
11 Platforms 4 sites Elevated erosion platforms Patchy, sandy deposits on top Uncertain connection to beach deposits 10,92 ± 0,40 m apsl 9,20 ± 0,89 m apsl Photos: Lorscheid ,31 ± 0,40 m apsl 4 Cala Pi 6 S Illot 2 Cova Baixa
12 Higher deposits 2 sites Patchy, sandy beach deposits Contains many shells or shell fragments at higher level than other beach deposits Uncertain connection to other layers 3,00 ± 0,87 m apsl 4,81 ± 1,50 m apsl 6,89 ± 0,96 m apsl 6 S Illot Photos: Lorscheid Cala Blava
13 Paleo relative sea-level elevations MIS 5e in littoral caves (Tucchimei et al. 2012)
14 Next steps RWL/IR GIA Calculation of lower boundaries Effects with different ice-sheets scenarios Dating Electron Spin Resonance (ESR) U/Th-series Aminoacid Racemization (AAR)
15 Thanks for your attention! Any questions? Literature LISIECKI, L.E. & RAYMO, M.E. 2006: A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18o records. Paleoceanography, 20, PA1003. ROVERE, A. & RAYMO, M.E. 2014: MIS 5e sea level: up to what point can we use literature reviews to answer the most pressing questions on the Last Interglacial ice sheets? AGU Fall Meeting TUCCIMEI, P., ONAC, B.P., DORALE, J.A., GINÉS, J., FORNÓS, J.J., GINÉS, A., SPADA, G., RUGGIERI, G. & MUCEDDA, M. 2012: Decoding last interglacial sea-level variations in the western Mediterranean using speleothem encrustations from coastal caves in Mallorca and Sardinia: A field data model comparison. Quarternary International, 262, p
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