Abstract
A new tool and method for collecting undisturbed subsurface samples in estuarine environments by means of trenching, timbering and sectioning is presented. Smoothing of sidewalls is achieved by a so-called cutting sediment profiler (CutSprof), while water draining into the trench is cleared by pumping. From smoothed sidewall sections, undisturbed thin sediment slices can then be collected for micromorphological and microfacies analyses. Results demonstrating the successful application of this procedure are presented for salt marshes of the Bensafrim River estuary (Lagos, Algarve, Portugal). In addition to palaeo-reconstructions in salt marsh settings, the CutSprof would be highly suitable in various other research domains as well as for environmental management purposes, particularly where sampling below the groundwater table is desirable to explore, for example, animal–sediment relationships in tidal-flat and mangrove ecosystems as well as the dynamics of coastal wetlands today threatened by ever-increasing anthropogenic influence.
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Acknowledgements
The authors wish to thank the Portuguese Science and Technology Foundation (FCT-MCTES) for the financial support of this ongoing investigation within the research project PTDC/CTEGIX/ 104035/2008 - FMI 5000: Environmental changes: Fluvio-marine interactions over the last 5000 yrs. The assistance of the SLIF (Littoral and Fluvial Systems) team of the Centre for Geographical Studies, IGOT, University of Lisbon is also gratefully acknowledged. The editors of Geo-Marine Letters and an anonymous reviewer are thanked for their considerable help in improving the manuscript.
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Araújo-Gomes, J., Ramos-Pereira, A. The new CutSprof sampling tool and method for micromorphological and microfacies analyses of subsurface salt marsh sediments, Algarve, Portugal. Geo-Mar Lett 35, 69–75 (2015). https://doi.org/10.1007/s00367-014-0391-1
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DOI: https://doi.org/10.1007/s00367-014-0391-1