Interglacial Diversity in the Mediterranean Basin, Insights from Central Italy Continental Carbonates

The Apuan Alps (central Italy).

Past interglacial periods can be seen as a series of natural experiments characterized by different boundary conditions (e.g. seasonal and latitudinal distribution of insolation, atmospheric greenhouse gas concentrations, extent of continental ice sheets), with different consequent effects on the character of climate change. Past interglacial are keys to understand past but also future-climate, because they represent potential analogues of the present warm period (Holocene) and offer the unique possibility to investigate the background of climate variability in which human-induced modifications operate, and to clarify their role in the natural sequence of events.

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Dr. Eleonora Regattieri (University Cologne).

Continental carbonates (speleothem and lacustrine sediment) from the Mediterranean basin represent invaluable archives of past climate. Particularly, oxygen stable isotope composition of these deposits responds sensitively to variations in regional hydrology. This information can be complemented by the study of others properties (e.g. elemental and mineralogical composition), to obtain more detailed information on local environmental changes. In this talk, several case studies from central Italy lakes and caves are presented.  They cover the Last Interglacial (ca. 130-90 ka), and the interglacial corresponding to the marine Isotope Stage (MIS) 19 (ca. 790-760 ka), considered the best orbital analog of the Holocene over the last million of years. All the presented records have independent, radiometric chronologies thanks to uranium-thorium dating of speleothem and to Argon/argon dating of volcanic ash layers interbedded to the lacustrine sediment. Climate evolution, hydrological response and millennial-scale variability are evaluated, and the potential link with the extra-regional and global climate is discussed.

Event Information:

Date, Time:07/05/2018, 16:00 h – 17:00 h

Location: Kleiner Hörsaal der Geologie (310a), Zülpicher Straße 49, Cologne

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Volcanism in the Eastern Carpathians and first insights into the geochemical record of Mohos crater

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Marc Bormann is a PhD student in the CRC project B2 “Climatic and Environmental History of the Balkans During the Last Glacial Cycle”. He studied Geography, Geology and Soil Science at the Universities of Cologne and Bonn. In his PhD project, starting in January 2014, he investigates a sediment record from the Mohos crater in the Eastern Romanian Carpathians using a multiproxy approach.

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Analysis of Migration Processes due to Environmental Conditions between 40,000 and 14,000 a BP in the Balkan region through Luminescence Dating

This PhD topic lies within the B1 project, which deals with the paleoenvironmental conditions during modern human migration through southeastern Europe. A multi-proxy approach combining sedimentology, geochemistry, rock magnetism and luminescence dating is applied on loess-paleosol sequences on geoarchives in Hungary, Serbia and Romania.

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