Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Pleistocene fluvial sediments (sheet No.13-143 Pečky)
Abstract
Altogether 6 different terraces of the Labe River are developed on the territory of the topologic sheet 13-143 Pečky. Two highest gravel aggradations, first at the elevation of 66 m (surface) and the second one at 51-58 m (surface) and 43-54 m (base) above the river are assigned to the Lower Pleistocene. Thickness of the lower terrace ranges between 9.5 and 14 m. Three lower terraces which belong to the middle terraces group are of mid Pleistocene age. The gravel of the highest of them with the surface in the altitude of 40-50 m and the base at 36-45 m is 1.5 to 5 m thick. The surface of the lower one lies at 20-21 m and the base at 14-18 m above the river. The gravel aggradation is 3-7 m thick. The about 1-5 m thick gravel body of the lowest terrace of this group has its surface 10-17 m and the base 8-15 m above the river. The gravel of the valley terrace fills the bottom of the present-day river and has its a displaced surface 0-4 m above the river. The base reaches usually 1-9 m below the river, but in Labe channel it is up to 11-17 m deep. It corresponds to Upper Pleistocene.
