engleski

The age of the Đurđevac Sands (N Croatia)

The modern approach to the exploration of Quaternary sediments within the CSF project SAPIQ in 2016 has resulted in significant findings in the Đurđevac Sands in the Pannonian area (continental climate). The Đurđevac Sands were preliminarily investigated in the sandpit Draganci. Within the dunes sets, two palaeosoils, type arenosol, were discovered. Sedimentological analysis and sampling of palaeosoils and overlying and underlying sands were performed. Unexpectedly, the 14C analysis of charcoal from the palaeosoils showed that these two palaeosoils developed just before and at the very beginning of the Holocene. Preserved bioturbations confirm that the palaeosoils are in situ. The older palaeosoil (12.483±53 a BP) is the thinner (about 15 cm thick) and the degree of pedogenic development indicates semi-arid climate with annual rainfall less than 300 mm. It is similar to the modern forest soil in the area. The younger palaeosoil (11.705±55 a BP) is about 40 cm thick and pedogenetically well developed. Dune sediments underlying those palaeosoils were formed before the end of the Pleistocene, and palaeosoils formed just before and at the beginning of the Holocene preserved them from erosion. Thus, it is possible that older dune sediments of the Đurđevac Sands were formed before the end of the Pleistocene, and palaeosoils formed just before and at the beginning of the Holocene preserved them from erosion.

Đurđevac Sands ; palaeosoil ; dune ; Holocene ; Pleistocene

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