Today's georelief of Owczary area was influenced by coming, and then withdrawal of the last Fenno-Scandian ice sheet. This period is called the Weichselian glaciation. The ice sheet coming from the north of Europe with a huge force rolled in front of and under itself - clays, sands, gravels and huge erratic boulders. The edge of the Odra valley near Owczary is formed mainly by boulder clay and sands. However, the characteristic, steep and deep gorges crossing the valley's edge in the east-west direction were formed after the glacier receded. They were formed as a result of leaching by rainwater that did not soak into the clay substrate.