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      Sediment deposition in the central Hauraki Gulf, New Zealand

      Boxberg, Florian; Blossier, Brice; de Lange, Willem P.; Fox, Bethany; Hebbeln, Dierk
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      Boxberg2019_Article_SedimentDepositionInTheCentral.pdf
      Published version, 6.102Mb
      DOI
       10.1007/s00367-019-00583-1
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      Boxberg, F., Blossier, B., de Lange, W. P., Fox, B., & Hebbeln, D. (2019). Sediment deposition in the central Hauraki Gulf, New Zealand. Geo-Marine Letters, 1–15. https://doi.org/10.1007/s00367-019-00583-1
      Permanent Research Commons link: https://hdl.handle.net/10289/13159
      Abstract
      Based on the analysis of 14 short sediment cores, we present new insights into the distribution of surficial sediments in the central Hauraki Gulf, a semi-enclosed coastal embayment on the northeast coast of New Zealand’s North Island. We identify and discuss the effects of interaction of modern wind-generated waves and currents with regard to deposition and reworking of sediments in the Gulf. The modern hydrodynamic regime is controlled by tidal currents, oceanic inflows, and wave-induced currents and it is responsible for a N-S gradient in sediment texture and elemental concentrations in the central Hauraki Gulf sediments. The present-day sediment input into the system is generally low and consists of fine-grained fluvial sediments mostly deposited in the southern study area and comparatively high inputs of relict carbonate material to the northern study sites. The central Hauraki Gulf sediments, which show numerous age reversals in the sedimentary record, can be characterised as palimpsest sediments, as a consequence of continuous reworking and storm-induced sediment transport. In view of the new data, a previously assumed significant post-transgression accumulation of sediments of > 10 m in the central Hauraki Gulf appears to be very unlikely.
      Date
      2019
      Type
      Journal Article
      Publisher
      Springer
      Rights
      © The Author(s) 2019

      This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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