In the Cretaceous period (approximately 100 million years ago), this area was the floor of a shallow sea where limestone, marl, and sandstone were deposited.
At the end of the Cretaceous, as a result of orogenic movements, this area was uplifted, creating the current geological structures.
In the 17th century, Roztocze became part of the Polish-Lithuanian Commonwealth, and after the partitions of Poland (1772-1795), it was divided between Austria, Prussia, and Russia.
After the war, due to border shifts, Roztocze was divided between Poland and the Soviet Union (now Ukraine).
As part of Operation Vistula (1947), thousands of Ukrainians, Lemkos, Boykos, and Hutsuls were resettled from southeastern Poland to the so-called Recovered Territories.
Simultaneously, Poles from the Eastern Borderlands (now Ukraine, Belarus, and Lithuania) were resettled to the Recovered Territories in Poland.