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14-Oct-2019 20:46

The oldest part comes from a depth of 1.05 meter and its conventional age is 5940 ± 95 BP (modelled date 5000–4790 BC, 68.2% probability interval).The accumulation rate varies between approximately 0.53 mm·yr.This rare, unstable isotope is produced from ordinary nitrogen 14.In earth's upper atmosphere, on the edge of what is commonly called outer space, light atomic nuclei from unknown sources outside of our solar system traveling at speeds approaching the speed of light called rain down continuously.The core has been also tested for the presence of trace elements (Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn) using ICP-OES.There are considerable variations in the concentrations of the tested metals – in many cases the concentration starts to rise at about 40 cm and may be connected with the human activity.These highly energetic nuclear bullets wreak havoc on the atoms in the upper atmosphere: tearing electrons from their orbitals and setting them free, knocking neutrons and protons from the tight confines of the nucleus and setting them free, generating x-rays and gamma rays as they decelerate, and creating exotic particles like muons and pions directly from their excessive kinetic energy.

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It has been shown (Shotyk, 1996) that peat sediments are important archives for the reconstruction of the past environmental changes, induced naturally and by human activity.A one-meter long peat core was taken from the peatland in Wolbrom (Silesian-Cracovian Upland, southern Poland).