engleski

Evidence of abrupt climate change preserved within Quaternary sedimentological sequences in Croatia – methodological approach

Aiming to identify and describe the evidence of Late Quaternary abrupt climate changes, preserved four different pedo-sedimentary complexes in Croatia will be investigated. They are Zmajevac loess-palaeosol sequence and Đurđevac Sands, located in the Pannonian region, and fluvioglacial sediments of Privlaka and karst lacustrine sediments of the Vrgoračko polje in the Croatian Dinaric region. The planned methodology implies geophysical surveying, utilization of remote sensing techniques drilling, and sampling, as well as carrying out various laboratory analyses to determine textural, geochemical, palaeobotanical, micromorphological, mineralogical, and geochronological properties of the marker horizons (MH). The MH of this study is considered those that indicate the change in climatic conditions, e.g. horizons formed by sediment cumulization synchronously to the vegetation regression upward on the top of well-developed paleosols, as markers of progressive aridization. The locations for sampling were selected based on previous field experience and supported by the results of geoelectrical sounding and drilling campaigns that delimited the lateral and vertical extent of the MH. The mineralogical and geochemical properties of several MH have already been described through previous research. The age of each MH will be established by radiocarbon dating, optically stimulated luminescence (OSL) dating or existing geochronological information [1] [2] [3] [4]. The results of micromorphological analysis and geochemical indicators [5] will provide information about the pedogenetic development of the palaeosols and will ultimately be translated into dynamics of climate change during the Late Quaternary.

Abrupt climate changes, Quaternary ; loess ; dune ; fluvioglacial sediment ; karst lake ; Croatia

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