the soils of the forest at the vorskla developed on different parent materials, especially on the loam, which is found in the eastern half of the forest. in the northwestern part of the forest, old alluvium sands play a role. they are distributed on the river terraces of gotnja and loknja. at the southern and south-eastern edge of the forest an oligozänischer sandy loam is common parent rock. in some places in the southern part of the forest, a rust-colored clay comes out. the oligozänische sandy loam and the rust-colored clay are the starting materials of soil formation, where erosion has removed the loess. under the oligozänischen clay are rocks from the cretaceous, which do not appear on the surface in the territory of the forest.