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Establishing a chronology of events is a critical step in reconstructing the palaeoclimate and it is important for all types of environmental records, including speleothems. Here, we analysed a unique series of flowstones deposited between 3.2 Ma (marine isotope stage (MIS) Km3) and 0.08 Ma (MIS 5). The studied flowstones are located in a classic karstic environment, the Račiška Pečina Cave in south-western Slovenia. Further, a detailed chronology of events was constructed based on oxygen isotope stratigraphy (OIS), combined with magnetostratigraphy and U-series dating. Two curves were selected as reference records where the LR04 record was used as the global curve and a Mediterranean record was used as the regional curve. The Račiška Pečina profile was divided into two segments separated by a principal disconformity. The lower segment correlated better with the regional Mediterranean curve, while the upper segment was with the global LR04 curve. These findings suggest that the main factors controlling environmental conditions in the cave area changed between 3.2 and 0.8 million years ago.

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Speleothems provide one of the most continuous terrestrial archives. However, due to changing conditions in temperature/humidity or the chemistry of percolating water, sedimentation breaks (hiatuses) and erosional events are possible and are commonly recorded in speleothems. Sedimentation breaks with durations longer than the resolution of the studied record should be considered in potential speleothem age-depth models. The most classic and reliable solution to the problem is the independent construction of age-depth models for the parts of speleothems separated by the hiatuses. However, in some cases, it is not possible to obtain a sufficient number of dating results for reliable age-depth model estimation. In such cases, the problem can be solved by the application of other sources of chronological information. Here, based on a few speleothem examples, an alternative approach – oxygen isotopic stratigraphy – is used to estimate the chronology for the parts of speleothems where there is not enough chronological information for classic age-depth models. As a result, the deposition break duration can be estimated.

Soil geochemical prospecting is becoming an increasingly important part of archaeological research. Therefore, it is possible to determine the location of various archaeological facilities that no longer exist in the study region. In this study, a morphological analysis of the “Stara Góra” deposit in Radzimowice (Lower Silesia, Poland) was performed using LiDAR DTM (light detection and ranging digital terrain model) images and historical data that describe mining in the vicinity of Radzimowice. This method identified numerous remains of centuries-old mining and metallurgical activity. The data collected were used to create a map of arsenic soil concentrations in this area. The map helped point to the exact locations of the old ore-processing facilities. Geochemical mapping was performed on a 20 × 20-m grid at a sampling depth of approximately 0.2 m. The samples were analysed by X-ray fluorescence spectrometry with energy-dispersive X-ray spectroscopy (XRF-EDS). The highest concentrations of this element occurred near the arsenic calciner and related dumps, as well as near dumps created during extraction from the Arnold shaft. In summary, in this article, we present the possibility of using a geochemical map of arsenic concentrations in soils supported by LiDAR data for archaeological purposes.

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