Soil samples were analyzed for clay mineralogy, grain size, chemical composition, magnetic susceptibility, and stable carbon isotopes. We excavated a 2.5 m deep soil profile and took contiguous bulk samples every 5 cm. In this study, we describe a sedimentary deposit situated above AscunsДѓ Cave (SW Romania) that should be in depositional connection with coeval stalagmites from the cave. This type of high-resolution sedimentation model is an important step for constructing the carbon budget in bottom waters of variable oxygen concentration.

Sedimentation rate shows an increase of about three times with the starting of the late Medieval, which correspond to the highest observed sediment discharge of the Danube as are considered the last 500-300 years. The revisited chronology pinpoints the first and second invasion of the coccolithophores Emiliania huxleyi at 2524 В± 87 and 625 В± 65 years cal. The results show excellent agreement with some of the previous studies, supporting a total age offset for the bulk OM of 60 years as MRE and 580 years as detritus organic carbon influence. The corrections for the В№вЃґC ages due to marine reservoir effect (MRE) and detritus organic carbon are correlated with exogenous information such as ВІВ№вЃ°Pb dating, metallurgy pollution and human-induced soil erosion, highlighting the Danube influence on the geochemistry and chronology of the NW Black Sea sediments through the input of terrigenous organic matter. We constructed a high-resolution Bayesian sedimentation model spanning the last 5500 years based on 25 AMS radiocarbon dated sediments of bulk organic matter (OM) sampled from the NW Black Sea anoxic waters of the continental slope.

Graphite timeslice example