| | | | In the Northern Bihor Mountains, massive limestone prevails alternating with thin bundles of conglomerates, grit stones and purplish-blue schists. In the North (in Măgura Vânătă Mountain) such grit stones and conglomerates appear, while South of it we find limestone and dolomites (Padiş-Scărişoara area), then further South, a second band of grit stones and schists (the Barsa Pit, Cetăţi Valley, Gârdişoara Valley), and lastly, a second band of limestone (Sighiştel Valley, Galbena Valley, Ponorului Fortress, Gârda Valley). All these are inclined from North to South, the strata being newer from North to South. | | |
The spring area of Someşul Cald represents a large graben in which the geological formations (of the unit) have collapsed on faults parallel with the Someş river course. The Mesozoic deposits that form this sector are represented by varied sedimentary rocks, in which Jurassic and Lower Cretaceous limestone predominates. An exception to this usual structure for the Northern Bihor is the area situated west of the strong fracture that follows Galbena Valley, from the springs to the North, until after the confluence with the Crişul Pietros, as well as the area west of the Vlădeasa Mountain crest. Millions of years ago, this Western area has collapsed on long faults of tens of kilometers.
| | | | The piles of deposits previously mounted on the unit (the sheets) have thus occupied an inferior position, being less affected by erosion. For this reason they have lasted up to present, in massifs such as Tătăroaia, Păltineţul, Dealul Munţilor, Măgura Ferice, Glăvoiu and Ţapu. | | | | | |
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