Gletscher vs. Fluss: Erosionskräfte im Kaukasus (Georgien) @Melanie Kranz Working group Geomorphology and Geohazards The working group Geomorphology and Geohazards focuses on the evolution of Earth's surface during the Quaternary (i.e., the last ~2.6 million years). The group's goal is to better understand the interplay between transport, weathering, and erosion processes, as well as their climatic and tectonic drivers in sediment and landscape systems, in order to make their future development more predictable. We use a combination of field, laboratory, and numerical methods and follow an interdisciplinary approach to better understand the development of our landscapes. Our understanding of landscape changes and the underlying processes is highly dependent on a robust chronology. For this reason, one of the methodological focuses of the working group is the application and development of geo- and thermochronological techniques, particularly electron spin resonance (ESR) and luminescence dating methods. These techniques provide important insights into the timing and pace of landscape developments as well as associated geohazards. Publications 2025 Bartz, M., 2025. Electron Spin Resonance (ESR) dating. In: Encyclopedia of Quaternary Science, 792-807. 2024 Bartz, M., King, G.E., Herman, F., Sueoka, S., Tsukamoto, S., Tagami, T., 2024. The impact of climate on relief in the northern Japanese Alps within the past 1 Myr – the case of the Tateyama mountains. Earth and Planetary Science Letters 644, 118830. Bartz, M., Duval, M., Alonso Escarza, M. J., and Rixhon, G., 2024: Older than expected: fluvial aggradation of the Rhine's main terrace at Kärlich dated around 1.5 Ma by electron spin resonance, E&G Quaternary Sci. J., 73, 139–144, DOI: 10.5194/egqsj-73-139-2024, 2024. Wen, X., Bartz, M., King, G.E., 2024. ESR and luminescence thermochronometry in the Rhône valley (Switzerland). Quaternary Geochronology 80, 101496. 2023 Duval., M., Guilarte Moreno, V., Bartz, M., Alonso Escarza, M.J., Ben Arous, E., del Val, M., García Rodríguez, C., 2023. ESR dating of quartz grains: evaluating measurement repeatability and reproducibility. Radiation Physics and Chemistry 111313. DOI: 10.1016/j.radphyschem.2023.111313 Walk, J., Schulte, P., Bartz, M., Binnie, A., Kehl, M., Mörchen, R., Sun, X., Stauch, G., Tittmann, C., Bol, R., Brückner, H., Lehmkuhl, F., 2023. Pedogenesis at the coastal arid-hyperarid transition deduced from a Late Quaternary chronosequence at Paposo, Atacama Desert. Catena 228, 107171. DOI: 10.1016/j.catena.2023.107171 Bartz, M., Peña, J., Grand, S., King, G.E., 2023. Potential impacts of chemical weathering on feldspar luminescence dating properties. Geochronology Discussions. DOI: 10.5194/gchron-5-51-2023 2022 Medialdea, A., Brill, D., King, G.E., Zander, A., Lopez-Ramirez, M.R., Bartz, M., Brückner, H., 2022. Violet stimulated luminescence as an alternative for dating complex colluvial sediments in the Atacama Desert. Quaternary Geochronology 71, 101337. DOI: 10.1016/j.quageo.2022.101337 Brill, D., Ageby, L., Obert, C., Hollerbach, R., Duval, M., Kolb, T., Bartz, M., 2022. Investigating the resetting of IRSL signals in beach cobbles and their potential for rock surface dating of marine terraces in Northern Chile. Marine Geology 443, 106692. DOI: 10.1016/j.margeo.2021.106692 Walk, J., Bartz, M., Stauch, G., Binnie, A., Brückner, H., Lehmkuhl, F., 2022. Weathering under coastal hyperaridity – Late Quaternary development of spectral, textural, and gravelometric alluvial fan surface characteristics. Quaternary Science Reviews 277, 107339. DOI: 10.1016/j.quascirev.2021.107339. Medialdea, A., Brill, D., King, G.E., Zander, A., Lopez-Ramirez, M.R., Bartz, M., Brückner, H., 2022. Violet stimulated luminescence as an alternative for dating complex colluvial sediments in the Atacama Desert. Quaternary Geochronology 71, 101337. DOI: 10.1016/j.quageo.2022.101337 2021 Weniger, G.-C., Bartz, M., Blumenröther, J., Bolin, V., Brückner, H., Andrés-Herrero, M., Kehl, M., Klein, K., Linstädter, J., Otto, T., Poti, A., Rotgänger, M., Val Peon, C., Tafelmaier, Y., Reicherter, K., 2021. The Westernmost Meditteranean. In: Litt, T., Richter, J., Schäbitz, F. (eds.): The journey of modern humans from Africa to Europe: culture-environmental interaction and mobility. Schweizerbart, Stuttgart. 2020 Bartz, M., Duval, M., Brill, D., Zander, A., King, G.E., Rhein, A., Walk, J., Stauch, G., Lehmkuhl, F., Brückner, H., 2020. Testing the potential of K-feldspar pIR-IRSL and quartz ESR for dating coastal alluvial fan complexes in arid environments. Quaternary International 556, 124-143. DOI: 10.1016/j.quaint.2020.03.037 Bartz, M., Walk, J., Binnie, S., Brill, D., Stauch, G., Lehmkuhl, F., Hoffmeister, D., Brückner, H., 2020. Late Pleistocene alluvial fan evolution along the coastal Atacama Desert (N Chile). Global and Planetary Change 190, 103091. DOI: 10.1016/j.gloplacha.2019.103091 Rovere, A., Ryan, D., Murray-Wallace, C., Simms, A., Vacchi, M., Dutton, A., Lorscheid, T., Chutcharavan, P., Brill, D., Bartz, M., Jankowski, N., Mueller, D., Cohen, K, Gowan, E., 2020. Descriptions of database fields for the World Atlas of Last Interglacial Shorelines (WALIS), Zenodo. DOI: 10.5281/zenodo.3961543 Medialdea, A., May, S.M., Brill, D., King, G., Ritter, B., Wennrich, V., Bartz, M., Zander, A., Hurtado, S., Kuiper, K., Hoffmeister, D., Schulte, P., Gröbner, M., Opitz, S., Brückner, H., Bubenzer, O., 2020. Identification of humid periods in the Atacama Desert through hillslope activity established by infrared stimulated luminescence (IRSL) dating. Global and Planetary Change 185, 103086. DOI: 10.1016/j.gloplacha.2019.103086 Walk, J., Stauch, G., Brückner, H., Hoffmeister, D., Lehmkuhl, F., Bartz, M., Sepúlveda, F.A., Reyers, M., Vásquez, P., 2020. Gradients in climate, geology, and topography affecting coastal alluvial fan morphodynamics in hyperarid regions – the Atacama perspective. Global and Planetary Change 185, 102994. DOI: 10.1016/j.gloplacha.2019.102994 2019 Bartz, M., Arnold, L.J., Spooner, A.M., Demuro, M., Campaña, I., Rixhon, G., Brückner, H., Duval, M., 2019. First experimental evaluation of the alpha efficiency in coarse-grained quartz for ESR dating purposes: implications for dose rate evaluation. Nature Scientific Reports 9, 19769. DOI: 10.1038/s41598-019-54688-9 Bartz, M., Arnold, L.J., Demuro, M., Duval, M., King, G.E., Rixhon, G., Álvarez Posada, C., Parés, J.M., Brückner, H., 2019. Single-grain TT-OSL dating results confirm an Early Pleistocene age for the lower Moulouya River deposits (NE Morocco). Quaternary Geochronology 49, 138-145. DOI: 10.1016/j.quageo.2018.04.007 Walk, J., Stauch, G., Bartz, M., Brückner, H., Lehmkuhl, F., 2019. Geomorphology of the coastal alluvial fan complex Guanillos, northern Chile. Journal of Maps 15 (2), 436-447. DOI: 10.1080/17445647.2019.1611499 Bosq, M., Bertran, P., Beauval, C., Kreutzer, S., Duval, M., Bartz, M., Mercier, N., Sitzia, L., Stephan, P., LITAQ project members, 2019. Stratigraphy and chronology of Pleistocene coastal deposits in northern Aquitaine, France: A reinvestigation. Quaternaire 30 (1), 5-20. DOI: 10.4000/quaternaire.11112 Bartz, M., 2019. Quaternary fluvial environments in NE Morocco inferred from geochronological and sedimentological investigations. E&G Quaternary Science Journal. Thesis Abstract 68, 1-4. DOI: 10.5194/egqsj-68-1-2019 2018 Bartz, M., Rixhon, R., Duval, M., King, G.E., Álvarez Posada, C., Parés, J.M., Brückner, H., 2018. Successful combination of electron spin resonance, luminescence and palaeomagnetic dating methods allows reconstruction of the Pleistocene evolution of the lower Moulouya river (NE Morocco). Quaternary Science Reviews 185, 153-171. DOI: 10.1016/j.quascirev.2017.11.008 Kreutzer, S., Duval, M., Bartz, M., Bertran, P., Bosq, M., Eynaud, F., Verdin, F., Mercier, N., 2018. Deciphering long-term coastal dynamics using IR-RF and ESR dating: A case study from Médoc, south-west France. Quaternary Geochronology 48, 108-120. DOI: 10.1016/j.quageo.2018.09.005 2017 Bartz, M., Rixhon, G., Kehl, M., El Ouahabi, M., Klasen, N., Brill, D., Weniger, G.-C., Mikdad, A., Brückner, H., 2017. Unravelling fluvial deposition and pedogenesis in ephemeral stream deposits in the vicinity of the prehistoric rock shelter of Ifri n'Ammar (NE Morocco) during the last 100 ka. Catena 152, 115-134. DOI : 10.1016/j.catena.2016.12.007 Duval, M., Bahain, J.-J., Bartz, M., Falguères, C., Guilarte, V., Moreno, D., Tissoux, H., del Val, M., Voinchet, P., Arnold, L.J., 2017. Defining minimum requirements for reporting ESR dating methodology and age estimates based on optically bleached quartz grains. Ancient TL 35 (1), 11-19. Rixhon, G., Bartz, M., El Ouahabi, M., Szemkus, N., Brückner, H., 2017. Contrasting terrace systems of the lower Moulouya river as indicator of crustal deformation in NE Morocco. Journal of African Earth Sciences 126, 45-57. DOI: 10.1016/j.jafrearsci.2016.11.005 2015 Bartz, M., Klasen, N., Zander, A., Brill, D., Rixhon, G., Seeliger, M., Eiwanger, J., Weniger, G.-C., Mikdad, A., Brückner, H., 2015. Luminescence dating of ephemeral stream deposits around the Palaeolithic site of Ifri n‘Ammar (Morocco). Quaternary Geochronology 30, 460-465. DOI: 10.1016/j.quageo.2015.02.012 Seeliger, M., Bartz, M., Brückner, H., 2015. Umweltgeschichte Elaias. In: Matthaei, A., Zimmermann, M. (eds.): Urbane Strukturen und bürgerliche Identität im Hellenismus – Die hellenistische Polis als Lebensform Band 5. Heidelberg. Verlag Antike. 2014 Seeliger, M., Brill, D., Feuser, S., Bartz, M., Erkul, E., Kelterbaum, D., Vött, A., Klein, C., Pirson, F., Brückner, H., 2014. Purpose and age of underwater walls in the Bay of Elaia (western Turkey) – a multidisciplinary approach. Geoarchaeology 29, 138-155. DOI: 10.1002/gea.21471 2013 Seeliger, M., Bartz, M., Erkul, E., Feuser, S., Kelterbaum, D., Klein, C., Pirson, F., Vött, A., Brückner, H., 2013. Taken from the sea, reclaimed by the sea: The fate of the closed harbour of Elaia, the maritime satellite city of Pergamum (Turkey). Quaternary International 312, 70-83. DOI: 10.1016/j.quaint.2013.03.004 Pint, A., Seeliger, M., Bartz, M., Kelterbaum, D., Brückner, H., 2013. Die Rekonstruktion der Paläoumwelt von Elaia anhand von mikropaläontologischen, sedimentologischen und geochemischen Kriterien. In: Pirson, F. (ed.): Pergamon - Bericht über die Arbeiten in der Kampagne 2012. Archäologischer Anzeiger 2013/2, 123-130. 2012 Seeliger, M., Bartz, M., Brückner, H., 2012. Der geschlossene Hafen von Elaia. In: Pirson, F. (ed.): Pergamon - Bericht über die Arbeiten in der Kampagne 2011. Archäologischer Anzeiger 2012/2, 234-240. 2011 Seeliger, M., Bartz, M., Brückner, H., 2011. Mauern im Meer – Geoarchäologische Untersuchungen in der Bucht von Elaia. In: Pirson, F. (ed.): Pergamon - Bericht über die Arbeiten in der Kampagne 2010. Archäologischer Anzeiger 2011/2, 175-185. Contact Prof. Dr. Melanie Kranz (Bartz) (Chair for Geomorphology and Geohazards) Gebäude IA 5/169 Telefon: +40 (0)234-32 12826 E-Mail: melanie.kranz "at" ruhr-uni-bochum.de Daniela Kortengräber (Secretariat) Gebäude IA 4/69 Telefon: +40 (0)234-32 26214 E-Mail: daniela.kortengraeber "at" rub.de