The geomorphological development of the Park’s territory dates back hundreds of millions of years and includes the following consecutive processes:

• Initial metamorphism and mountain formation (309-228 million years ago)

• Subsequent formation of a water basin and sedimentation and intensive magmatic activity and new metamorphism (170-160 million years ago)

• Intensive magmatic activity and new erection of mountain chains, associated with the processes of collision along the south edge of the Eurasian tectonic plate (100-80 million years ago)

• Contemporary modelling of the topography as a result of the processes of weathering and erosion. The deep gorge-like indentation of some of the river valleys is also due to the last glaciations, during which the sea level has decreased with several tens of meters. The firth of Veleka river, for example, stretches inland for about 8 kilometers. The neotectonic movements also influence the geomorphological processes. The seaside goes down a few millimeters per year, while other parts of the region rise.