The main rocks of the wider region are limestone and flysh. Geotectonically the region belongs to the area of Pindos.
The limestone was formated millions of years ago. In the region there is mostly black limestone, which shapes many caves, rock roofs and underground galleries.
The mountains of the region are characterized by big vertical rocky surfaces, steep slopes and impressive geological formations. The Alpine regions of Gamila bear evident the marks of the Ice Age.