Frank Preusser, University of Freiburg, Germany, email@example.com, (lead convener) Flavio Anselmetti, University of Bern, Switzerland
Markus Fiebig, University of Natural Resources and Life Sciences, Vienna, Austria Gerald Gabriel, Leibniz Institute for Applied Geophysics, Hannover, Germany
Scientific theme: 2B: Glacial and periglacial geomorphology
SACCOM-Stratigraphy & Chronology; TERPRO-Terrestrial Processes, Deposits and History
Abstract: This session addresses overdeepened valleys and basins, which are found below the present landscape surface in areas formerly affected by glaciations. As they reach below their fluvial base level, overdeepened structures are of glacial origin, presumably formed by pressurized subglacial meltwater. In mountain belts, overdeepened features mainly follow tectonic structures, weak lithologies, and/or Pleistocene ice confluence and diffluence situations. Overdeepening resulted in buried elongated valleys, mainly oriented parallel to former ice flow, and glacially scoured basins in the ablation area of glaciers. In the session, primary data from ice-proximal signals from overdeepened structures can be compared with published information from distal basin infills.
Comparison with the global marine ice-volume record is aspired. Understanding and interpretation of glacial sequences also provide the base to develop a better picture of past atmospheric circulation during glacial times. Presentations dealing with all aspects of such overedeepenings including formation, infill, chronology,
paleoenvironmental significance and applied aspects are welcome.
Christian Zeeden, Leibniz Institute for Applied Geophysics, Hannover, Germany, Christian.firstname.lastname@example.org, (lead convener)
Shiling Yang, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China Janina Nett, RWTH Aachen University, Aachen, Germany
Christoph Schmidt, University of Lausanne, Switzerland Daniel Veres, Institute of Speleology, Cluj-Napoca, Romania
Scientific theme: 5: Climate record, processes and models
TERPRO-Terrestrial Processes, Deposits and History; SACCOM-Stratigraphy & Chronology
Abstract: Loess is a widespread aeolian sediment. It covers wide areas, especially in Eurasia. Many studies establish valuable records of sedimentation history and sediment composition at single localities. However, dust deposits are often considered in singularity or only a few localities are compared which hinders the understanding of broad-scale environmental and paleoclimatic implications. The comparison and relation between several records at supra-regional and continental scale offers the opportunity to investigate environmental and climatic processes, which are often not well understood. Both reliable dating and high-resolution, proxy data are required to understand the dust dynamics and soil formation processes in the past, as recorded by loess and other dust deposits.
This session brings a large-scale image of loess research together – beyond local studies. Especially welcome are contributions utilizing novel methods (of both dating and proxy records), and studies covering large areas, or spanning a bridge between loess and other geoarchives (fluvial, lacustrine, marine).