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Holocene sea levels of Bonaire (Leeward Antilles) and tectonic implications

Climatic signals in geomorphological systems

Auteur(s) et Affiliation(s)

ENGEL, M.
Univ., Inst. of Geography, Köln, Allemagne
BRÜCKNER, H.
Univ., Inst. of Geography, Köln, Allemagne
SCHEFFERS, A.M.
Southern Cross Univ., Southern Cross GeoScience, Lismore, Australie
MAY, S.M.
Univ., Inst. of Geography, Köln, Allemagne
KELLETAT, D.H.
Univ., Inst. of Geography, Köln, Allemagne


Description :
The AA. present a relative sea-level (RSL) curve for the island of Bonaire (S Caribbean). They used 42 C ages from 20 sediment cores taken from 9 different sedimentary archives along the coast. The sedimentary environment of each index point was linked to a palaeo-water depth based on literature and field observations. The index points trace a local RSL history of decelerating rise since 7000-6000 years ago and subsequent asymptotical approximation, similar to existing RSL curves from Curaçao and Venezuela. The results were compared to a simulation of Holocene sea-level history (reference model) which considers global effects and regional GIA (including consequences for geopotential and vertical position of earth surface). Even though the central and NW parts of Bonaire experienced slow tectonic uplift of up to 50 cm since the mid-Holocene and tentative correction for compaction was applied, the new RSL curve for Bonaire runs slightly below the reference model.


Type de document :
Article de monographie

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2014, vol. 58, n°. 1, Supl., p. 159-178, nombre de pages : 20, Références bibliographiques : 48 ref.

Date :
2014

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger

Langue :
Anglais
Droits :
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