New Mazovian Interglacial site at Gajec - Łagowskie Lakeland [western Poland]

Gajec [Rze-1] borehole was drilled for needs of detailed geological mapping of Poland at the scale 1 : 50 000 (sheet Rzepin ). A deep tunnel valley was recognized in this borehole. It was eroded to 120 m below a see level in the Lower Miocene sediments. The tunnel was filled with 85 m thick series of sands, mud and dusty till deposited during the San Glaciation [the Elsterian Glaciation]. The sediments from the depth interval of 67,9 m - 57,1 m have been examined by palinological analysis. The data obtained indicate that the pollen succession from the Gajec section has features characteristic of the Mazovian [Holsteinian] pollen succession. These features are the high proportion of coniferous trees [Pinus, Picea, Taxus, Abies], and the association of Alnus with Picea and Carpinus with Abies, Quercus and Corylus as well the most abundant thermophilous elements. Warmth-demanding taxa are represented by pollen of Pterocarya, Celtis, Juglans, Buxus, Ilex aquifolium and Vitis