Research article 24 Jul 2019
Research article | 24 Jul 2019
Coastal lowland and floodplain evolution along the lower reaches of the Supsa River (western Georgia)
Hannes Laermanns et al.
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Dominik Brill, Simon Matthias May, Nadia Mhammdi, Georgina King, Benjamin Lehmann, Christoph Burow, Dennis Wolf, Anja Zander, and Helmut Brückner
Earth Surf. Dynam., 9, 205–234, https://doi.org/10.5194/esurf-9-205-2021, https://doi.org/10.5194/esurf-9-205-2021, 2021
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Wave-transported boulders are important records for storm and tsunami impact over geological timescales. Their use for hazard assessment requires chronological information. We investigated the potential of a new dating technique, luminescence rock surface exposure dating, for estimating transport ages of wave-emplaced boulders. Our results indicate that the new approach may provide chronological information on decadal to millennial timescales for boulders not datable by any other method so far.
Max Engel, Stefanie Rückmann, Philipp Drechsler, Dominik Brill, Stephan Opitz, Jörg W. Fassbinder, Anna Pint, Kim Peis, Dennis Wolf, Christoph Gerber, Kristina Pfeiffer, Ricardo Eichmann, and Helmut Brückner
E&G Quaternary Sci. J., 68, 215–236, https://doi.org/10.5194/egqsj-68-215-2020, https://doi.org/10.5194/egqsj-68-215-2020, 2020
Dominik Brill, Simon Matthias May, Max Engel, Michelle Reyes, Anna Pint, Stephan Opitz, Manuel Dierick, Lia Anne Gonzalo, Sascha Esser, and Helmut Brückner
Nat. Hazards Earth Syst. Sci., 16, 2799–2822, https://doi.org/10.5194/nhess-16-2799-2016, https://doi.org/10.5194/nhess-16-2799-2016, 2016
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Sediments and landforms related to Typhoon Haiyan were documented for coastal settings on the Philippines. Sand sheets are restricted to coasts with strong inundation, while washover fans due to overtopping waves were more abundant. Wave-generated coral ridges are reported from an intertidal reef platform. As generated by an exceptional storm, documented signatures like the limited landward extent of sand sheets may potentially help to distinguish storm and tsunami in the geological record.
S. M. May, M. Engel, D. Brill, C. Cuadra, A. M. F. Lagmay, J. Santiago, J. K. Suarez, M. Reyes, and H. Brückner
Earth Surf. Dynam., 3, 543–558, https://doi.org/10.5194/esurf-3-543-2015, https://doi.org/10.5194/esurf-3-543-2015, 2015
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Block and boulder fields record catastrophic coastal flooding events and play a pivotal role in coastal hazard assessment. After Supertyphoon Haiyan on 8 Nov 2013 the transport of extremely large blocks of up to 180 t in E Samar (Philippines) was documented, indicating that hydrodynamic conditions induced by tropical cyclones, including infragravity waves, and resulting coarse-clast transport patterns may be comparable to tsunamis.
Related subject area
Paleo-environments
Palaeoenvironmental reconstruction on the basis of Quaternary palaeo dune sequences on Fuerteventura
Reconstruction of palaeoenvironmental variability based on an inter-comparison of four lacustrine archives on the Peloponnese (Greece) for the last 5000 years
Anthropogenic and climate signals in late-Holocene peat layers of an ombrotrophic bog in the Styrian Enns valley (Austrian Alps)
The genesis of Yedoma Ice Complex permafrost – grain-size endmember modeling analysis from Siberia and Alaska
Long-term human impact and environmental change in mid-western Ireland, with particular reference to Céide Fields – an overview
Chemotaxonomic patterns of vegetation and soils along altitudinal transects of the Bale Mountains, Ethiopia, and implications for paleovegetation reconstructions – Part 1: stable isotopes and sugar biomarkers
Chemotaxonomic patterns of vegetation and soils along altitudinal transects of the Bale Mountains, Ethiopia, and implications for paleovegetation reconstructions – Part II: lignin-derived phenols and leaf-wax-derived n-alkanes
Grain-size distribution unmixing using the R package EMMAgeo
6200 years of human activities and environmental change in the northern central Alps
Christopher-Bastian Roettig
E&G Quaternary Sci. J., 69, 161–163, https://doi.org/10.5194/egqsj-69-161-2020, https://doi.org/10.5194/egqsj-69-161-2020, 2020
Joana Seguin, Pavlos Avramidis, Annette Haug, Torben Kessler, Arndt Schimmelmann, and Ingmar Unkel
E&G Quaternary Sci. J., 69, 165–186, https://doi.org/10.5194/egqsj-69-165-2020, https://doi.org/10.5194/egqsj-69-165-2020, 2020
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We present two new palaeolake archives of Pheneos and Kaisari, Peloponnese, and compare them with records from Stymphalia and Asea by applying the same set of analyses to all sites. We focus on different spatial scales to estimate the validity range of the proxy signals. Geochemical ratios depict hydrological variation and environmental changes over the last 5000 years. They indicate drier phases, but timing and duration vary, which may be explained by site-specific ecosystem responses.
Wolfgang Knierzinger, Ruth Drescher-Schneider, Klaus-Holger Knorr, Simon Drollinger, Andreas Limbeck, Lukas Brunnbauer, Felix Horak, Daniela Festi, and Michael Wagreich
E&G Quaternary Sci. J., 69, 121–137, https://doi.org/10.5194/egqsj-69-121-2020, https://doi.org/10.5194/egqsj-69-121-2020, 2020
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We present multi-proxy analyses of a 14C-dated peat core covering the past ⁓5000 years from the ombrotrophic Pürgschachen Moor. Pronounced increases in cultural indicators suggest significant human activity in the Bronze Age and in the period of the late La Tène culture. We found strong, climate-controlled interrelations between the pollen record, the humification degree and the ash content. Human activity is reflected in the pollen record and by heavy metals.
Lutz Schirrmeister, Elisabeth Dietze, Heidrun Matthes, Guido Grosse, Jens Strauss, Sebastian Laboor, Mathias Ulrich, Frank Kienast, and Sebastian Wetterich
E&G Quaternary Sci. J., 69, 33–53, https://doi.org/10.5194/egqsj-69-33-2020, https://doi.org/10.5194/egqsj-69-33-2020, 2020
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Late Pleistocene Yedoma deposits of Siberia and Alaska are prone to degradation with warming temperatures.
Multimodal grain-size distributions of >700 samples indicate varieties of sediment production, transport, and deposition.
These processes were disentangled using robust endmember modeling analysis.
Nine robust grain-size endmembers characterize these deposits.
The data set was finally classified using cluster analysis.
The polygenetic Yedoma origin is proved.
Michael O'Connell, Karen Molloy, and Eneda Jennings
E&G Quaternary Sci. J., 69, 1–32, https://doi.org/10.5194/egqsj-69-1-2020, https://doi.org/10.5194/egqsj-69-1-2020, 2020
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Long-term environmental change in Co. Mayo, on the mid-Atlantic seaboard of Ireland, is discussed. Pollen diagrams and bog pine, dated by 14C and dendrochronology, provide evidence for woodlands, farming and climate change. Intensive farming is dated to the early Neolithic (3800–3400 BC) prior to wide-scale spread of blanket bog. Construction of the peat-covered, stone-wall field system at Céide Fields occurred at this time which is unexpectedly early. Bronze and Iron Age activity is detailed.
Betelhem Mekonnen, Wolfgang Zech, Bruno Glaser, Bruk Lemma, Tobias Bromm, Sileshi Nemomissa, Tamrat Bekele, and Michael Zech
E&G Quaternary Sci. J., 68, 177–188, https://doi.org/10.5194/egqsj-68-177-2019, https://doi.org/10.5194/egqsj-68-177-2019, 2019
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The study evaluates the ability of stable isotopes (δ13C and δ15N) and sugar biomarkers to distinguish Erica from the dominant vegetation of the Bale Mountains in order to reconstruct the past extent of Erica on the Sanetti Plateau. No significant differences in stable isotopes are found between the dominant plant species. Although Erica is characterized by quite high (G+M)/(A+X) ratios, it cannot be unambiguously distinguished from other plants due to degradation and soil microbial effects.
Bruk Lemma, Betelhem Mekonnen, Bruno Glaser, Wolfgang Zech, Sileshi Nemomissa, Tamrat Bekele, Lucas Bittner, and Michael Zech
E&G Quaternary Sci. J., 68, 189–200, https://doi.org/10.5194/egqsj-68-189-2019, https://doi.org/10.5194/egqsj-68-189-2019, 2019
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Chemotaxonomic identification of keystone plant species in the Bale Mountains are possible using lignin phenols. However, Erica could not be differentiated chemotaxonomically from all other investigated plants using n-alkanes. Unambiguous characteristic patterns of lignin phenols reflected in the plant samples were not sustained in the organic layers and mineral topsoils. This is due to degradation and organic matter inputs by roots. Therefore, the past extent of Erica is still speculative.
Elisabeth Dietze and Michael Dietze
E&G Quaternary Sci. J., 68, 29–46, https://doi.org/10.5194/egqsj-68-29-2019, https://doi.org/10.5194/egqsj-68-29-2019, 2019
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Sedimentary deposits provide insights into past Earth surface dynamics via the size distribution of mineral grains documenting the erosion, transport and deposition history. This study introduces structured procedures to decipher the distinct grain-size distributions of sediment samples that were mixed during/after deposition, using the free statistical tool EMMAgeo. Compared with other algorithms, EMMAgeo is unique as it provides uncertainty estimates and allows expert knowledge to be included.
Clemens von Scheffer, Annika Lange, François De Vleeschouwer, Joachim Schrautzer, and Ingmar Unkel
E&G Quaternary Sci. J., 68, 13–28, https://doi.org/10.5194/egqsj-68-13-2019, https://doi.org/10.5194/egqsj-68-13-2019, 2019
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By using geochemical and pollen data, this study wanted to close knowledge gaps on the interconnection of climate, environment and human impact in the Kleinwalser Valley (Kleinwalsertal, northern central Alps) over the past 6200 years. For a long time, the Walser people were believed to be the first settlers, who cultivated the valley. However, humans have recurrently used and modified the landscape for at least 5500 years by burning or cutting down forests and practicing pasture management.
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Short summary
The landscape on the Black Sea coast of Georgia has changed significantly during the last few millennia. By using granulometric and geochemical analyses, we reconstructed significant sea level, coastline and palaeoenvironmental changes that have taken place in the surroundings of the Supsa fan since at least 4000 BCE.
The landscape on the Black Sea coast of Georgia has changed significantly during the last few...