Paleozoic deposits of various characters can be found especially in the northern and eastern parts of the Geopark. Thick successions of phyllites (so-called roofing slates) can be found in the area of Železný Brod. They pertain to the Krkonoše–Jizera Crystalline Complex and are usually greyish-green or purplish in colour.

Mesozoic deposition in our territory occurred primarily in the late Cretaceous times.

In the Paleogene and Neogene (formerly referred to as the Tertiary), the Geopark territory was rather a denudational area. Sediments of this age have not been reported from here.