Ophiolite-gabbro cumulates are identified as oceanic-type gabbros and basalts are believed to have formed from up to 20 percent pre-existing crustal rock. Among the acidic magmatic intrusive bodies in the area are granites and granodiorites. In the west, in the vicinity of Korab Mountain, is a limestone formation with layers of chert and a flysch formation dominating the sub-soil, made up of claystone, limestone and siltstone.